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b038ced7 SW |
1 | /* |
2 | * Copyright (c) 2006 Chelsio, Inc. All rights reserved. | |
b038ced7 SW |
3 | * |
4 | * This software is available to you under a choice of one of two | |
5 | * licenses. You may choose to be licensed under the terms of the GNU | |
6 | * General Public License (GPL) Version 2, available from the file | |
7 | * COPYING in the main directory of this source tree, or the | |
8 | * OpenIB.org BSD license below: | |
9 | * | |
10 | * Redistribution and use in source and binary forms, with or | |
11 | * without modification, are permitted provided that the following | |
12 | * conditions are met: | |
13 | * | |
14 | * - Redistributions of source code must retain the above | |
15 | * copyright notice, this list of conditions and the following | |
16 | * disclaimer. | |
17 | * | |
18 | * - Redistributions in binary form must reproduce the above | |
19 | * copyright notice, this list of conditions and the following | |
20 | * disclaimer in the documentation and/or other materials | |
21 | * provided with the distribution. | |
22 | * | |
23 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, | |
24 | * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF | |
25 | * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND | |
26 | * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS | |
27 | * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN | |
28 | * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN | |
29 | * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE | |
30 | * SOFTWARE. | |
31 | */ | |
32 | #include <linux/module.h> | |
33 | #include <linux/list.h> | |
5a0e3ad6 | 34 | #include <linux/slab.h> |
b038ced7 SW |
35 | #include <linux/workqueue.h> |
36 | #include <linux/skbuff.h> | |
37 | #include <linux/timer.h> | |
38 | #include <linux/notifier.h> | |
8704e9a8 | 39 | #include <linux/inetdevice.h> |
b038ced7 SW |
40 | |
41 | #include <net/neighbour.h> | |
42 | #include <net/netevent.h> | |
43 | #include <net/route.h> | |
44 | ||
45 | #include "tcb.h" | |
46 | #include "cxgb3_offload.h" | |
47 | #include "iwch.h" | |
48 | #include "iwch_provider.h" | |
49 | #include "iwch_cm.h" | |
50 | ||
51 | static char *states[] = { | |
52 | "idle", | |
53 | "listen", | |
54 | "connecting", | |
55 | "mpa_wait_req", | |
56 | "mpa_req_sent", | |
57 | "mpa_req_rcvd", | |
58 | "mpa_rep_sent", | |
59 | "fpdu_mode", | |
60 | "aborting", | |
61 | "closing", | |
62 | "moribund", | |
63 | "dead", | |
64 | NULL, | |
65 | }; | |
66 | ||
f8b0dfd1 SW |
67 | int peer2peer = 0; |
68 | module_param(peer2peer, int, 0644); | |
69 | MODULE_PARM_DESC(peer2peer, "Support peer2peer ULPs (default=0)"); | |
70 | ||
77a8d574 | 71 | static int ep_timeout_secs = 60; |
e54664c0 | 72 | module_param(ep_timeout_secs, int, 0644); |
b038ced7 | 73 | MODULE_PARM_DESC(ep_timeout_secs, "CM Endpoint operation timeout " |
77a8d574 | 74 | "in seconds (default=60)"); |
b038ced7 SW |
75 | |
76 | static int mpa_rev = 1; | |
e54664c0 | 77 | module_param(mpa_rev, int, 0644); |
b038ced7 SW |
78 | MODULE_PARM_DESC(mpa_rev, "MPA Revision, 0 supports amso1100, " |
79 | "1 is spec compliant. (default=1)"); | |
80 | ||
81 | static int markers_enabled = 0; | |
e54664c0 | 82 | module_param(markers_enabled, int, 0644); |
b038ced7 SW |
83 | MODULE_PARM_DESC(markers_enabled, "Enable MPA MARKERS (default(0)=disabled)"); |
84 | ||
85 | static int crc_enabled = 1; | |
e54664c0 | 86 | module_param(crc_enabled, int, 0644); |
b038ced7 SW |
87 | MODULE_PARM_DESC(crc_enabled, "Enable MPA CRC (default(1)=enabled)"); |
88 | ||
89 | static int rcv_win = 256 * 1024; | |
e54664c0 | 90 | module_param(rcv_win, int, 0644); |
b038ced7 SW |
91 | MODULE_PARM_DESC(rcv_win, "TCP receive window in bytes (default=256)"); |
92 | ||
93 | static int snd_win = 32 * 1024; | |
e54664c0 | 94 | module_param(snd_win, int, 0644); |
b038ced7 SW |
95 | MODULE_PARM_DESC(snd_win, "TCP send window in bytes (default=32KB)"); |
96 | ||
97 | static unsigned int nocong = 0; | |
e54664c0 | 98 | module_param(nocong, uint, 0644); |
b038ced7 SW |
99 | MODULE_PARM_DESC(nocong, "Turn off congestion control (default=0)"); |
100 | ||
101 | static unsigned int cong_flavor = 1; | |
e54664c0 | 102 | module_param(cong_flavor, uint, 0644); |
b038ced7 SW |
103 | MODULE_PARM_DESC(cong_flavor, "TCP Congestion control flavor (default=1)"); |
104 | ||
b038ced7 | 105 | static struct workqueue_struct *workq; |
b038ced7 SW |
106 | |
107 | static struct sk_buff_head rxq; | |
b038ced7 SW |
108 | |
109 | static struct sk_buff *get_skb(struct sk_buff *skb, int len, gfp_t gfp); | |
110 | static void ep_timeout(unsigned long arg); | |
111 | static void connect_reply_upcall(struct iwch_ep *ep, int status); | |
112 | ||
113 | static void start_ep_timer(struct iwch_ep *ep) | |
114 | { | |
33718363 | 115 | PDBG("%s ep %p\n", __func__, ep); |
b038ced7 | 116 | if (timer_pending(&ep->timer)) { |
33718363 | 117 | PDBG("%s stopped / restarted timer ep %p\n", __func__, ep); |
b038ced7 SW |
118 | del_timer_sync(&ep->timer); |
119 | } else | |
120 | get_ep(&ep->com); | |
121 | ep->timer.expires = jiffies + ep_timeout_secs * HZ; | |
122 | ep->timer.data = (unsigned long)ep; | |
123 | ep->timer.function = ep_timeout; | |
124 | add_timer(&ep->timer); | |
125 | } | |
126 | ||
127 | static void stop_ep_timer(struct iwch_ep *ep) | |
128 | { | |
33718363 | 129 | PDBG("%s ep %p\n", __func__, ep); |
989a1780 | 130 | if (!timer_pending(&ep->timer)) { |
5107c2a3 | 131 | WARN(1, "%s timer stopped when its not running! ep %p state %u\n", |
989a1780 | 132 | __func__, ep, ep->com.state); |
989a1780 SW |
133 | return; |
134 | } | |
b038ced7 SW |
135 | del_timer_sync(&ep->timer); |
136 | put_ep(&ep->com); | |
137 | } | |
138 | ||
18199f57 | 139 | static int iwch_l2t_send(struct t3cdev *tdev, struct sk_buff *skb, struct l2t_entry *l2e) |
04b5d028 SW |
140 | { |
141 | int error = 0; | |
142 | struct cxio_rdev *rdev; | |
143 | ||
144 | rdev = (struct cxio_rdev *)tdev->ulp; | |
145 | if (cxio_fatal_error(rdev)) { | |
146 | kfree_skb(skb); | |
147 | return -EIO; | |
148 | } | |
149 | error = l2t_send(tdev, skb, l2e); | |
73a203d2 | 150 | if (error < 0) |
04b5d028 | 151 | kfree_skb(skb); |
67f1aee6 | 152 | return error < 0 ? error : 0; |
04b5d028 SW |
153 | } |
154 | ||
155 | int iwch_cxgb3_ofld_send(struct t3cdev *tdev, struct sk_buff *skb) | |
156 | { | |
157 | int error = 0; | |
158 | struct cxio_rdev *rdev; | |
159 | ||
160 | rdev = (struct cxio_rdev *)tdev->ulp; | |
161 | if (cxio_fatal_error(rdev)) { | |
162 | kfree_skb(skb); | |
163 | return -EIO; | |
164 | } | |
165 | error = cxgb3_ofld_send(tdev, skb); | |
73a203d2 | 166 | if (error < 0) |
04b5d028 | 167 | kfree_skb(skb); |
67f1aee6 | 168 | return error < 0 ? error : 0; |
04b5d028 SW |
169 | } |
170 | ||
b038ced7 SW |
171 | static void release_tid(struct t3cdev *tdev, u32 hwtid, struct sk_buff *skb) |
172 | { | |
173 | struct cpl_tid_release *req; | |
174 | ||
175 | skb = get_skb(skb, sizeof *req, GFP_KERNEL); | |
176 | if (!skb) | |
177 | return; | |
178 | req = (struct cpl_tid_release *) skb_put(skb, sizeof(*req)); | |
179 | req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_FORWARD)); | |
180 | OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_TID_RELEASE, hwtid)); | |
181 | skb->priority = CPL_PRIORITY_SETUP; | |
04b5d028 | 182 | iwch_cxgb3_ofld_send(tdev, skb); |
b038ced7 SW |
183 | return; |
184 | } | |
185 | ||
186 | int iwch_quiesce_tid(struct iwch_ep *ep) | |
187 | { | |
188 | struct cpl_set_tcb_field *req; | |
189 | struct sk_buff *skb = get_skb(NULL, sizeof(*req), GFP_KERNEL); | |
190 | ||
191 | if (!skb) | |
192 | return -ENOMEM; | |
193 | req = (struct cpl_set_tcb_field *) skb_put(skb, sizeof(*req)); | |
194 | req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_FORWARD)); | |
195 | req->wr.wr_lo = htonl(V_WR_TID(ep->hwtid)); | |
196 | OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_SET_TCB_FIELD, ep->hwtid)); | |
197 | req->reply = 0; | |
198 | req->cpu_idx = 0; | |
199 | req->word = htons(W_TCB_RX_QUIESCE); | |
200 | req->mask = cpu_to_be64(1ULL << S_TCB_RX_QUIESCE); | |
201 | req->val = cpu_to_be64(1 << S_TCB_RX_QUIESCE); | |
202 | ||
203 | skb->priority = CPL_PRIORITY_DATA; | |
04b5d028 | 204 | return iwch_cxgb3_ofld_send(ep->com.tdev, skb); |
b038ced7 SW |
205 | } |
206 | ||
207 | int iwch_resume_tid(struct iwch_ep *ep) | |
208 | { | |
209 | struct cpl_set_tcb_field *req; | |
210 | struct sk_buff *skb = get_skb(NULL, sizeof(*req), GFP_KERNEL); | |
211 | ||
212 | if (!skb) | |
213 | return -ENOMEM; | |
214 | req = (struct cpl_set_tcb_field *) skb_put(skb, sizeof(*req)); | |
215 | req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_FORWARD)); | |
216 | req->wr.wr_lo = htonl(V_WR_TID(ep->hwtid)); | |
217 | OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_SET_TCB_FIELD, ep->hwtid)); | |
218 | req->reply = 0; | |
219 | req->cpu_idx = 0; | |
220 | req->word = htons(W_TCB_RX_QUIESCE); | |
221 | req->mask = cpu_to_be64(1ULL << S_TCB_RX_QUIESCE); | |
222 | req->val = 0; | |
223 | ||
224 | skb->priority = CPL_PRIORITY_DATA; | |
04b5d028 | 225 | return iwch_cxgb3_ofld_send(ep->com.tdev, skb); |
b038ced7 SW |
226 | } |
227 | ||
228 | static void set_emss(struct iwch_ep *ep, u16 opt) | |
229 | { | |
33718363 | 230 | PDBG("%s ep %p opt %u\n", __func__, ep, opt); |
b038ced7 SW |
231 | ep->emss = T3C_DATA(ep->com.tdev)->mtus[G_TCPOPT_MSS(opt)] - 40; |
232 | if (G_TCPOPT_TSTAMP(opt)) | |
233 | ep->emss -= 12; | |
234 | if (ep->emss < 128) | |
235 | ep->emss = 128; | |
236 | PDBG("emss=%d\n", ep->emss); | |
237 | } | |
238 | ||
239 | static enum iwch_ep_state state_read(struct iwch_ep_common *epc) | |
240 | { | |
241 | unsigned long flags; | |
242 | enum iwch_ep_state state; | |
243 | ||
244 | spin_lock_irqsave(&epc->lock, flags); | |
245 | state = epc->state; | |
246 | spin_unlock_irqrestore(&epc->lock, flags); | |
247 | return state; | |
248 | } | |
249 | ||
2b540355 | 250 | static void __state_set(struct iwch_ep_common *epc, enum iwch_ep_state new) |
b038ced7 SW |
251 | { |
252 | epc->state = new; | |
253 | } | |
254 | ||
255 | static void state_set(struct iwch_ep_common *epc, enum iwch_ep_state new) | |
256 | { | |
257 | unsigned long flags; | |
258 | ||
259 | spin_lock_irqsave(&epc->lock, flags); | |
33718363 | 260 | PDBG("%s - %s -> %s\n", __func__, states[epc->state], states[new]); |
b038ced7 SW |
261 | __state_set(epc, new); |
262 | spin_unlock_irqrestore(&epc->lock, flags); | |
263 | return; | |
264 | } | |
265 | ||
266 | static void *alloc_ep(int size, gfp_t gfp) | |
267 | { | |
268 | struct iwch_ep_common *epc; | |
269 | ||
dd00cc48 | 270 | epc = kzalloc(size, gfp); |
b038ced7 | 271 | if (epc) { |
b038ced7 SW |
272 | kref_init(&epc->kref); |
273 | spin_lock_init(&epc->lock); | |
274 | init_waitqueue_head(&epc->waitq); | |
275 | } | |
33718363 | 276 | PDBG("%s alloc ep %p\n", __func__, epc); |
b038ced7 SW |
277 | return epc; |
278 | } | |
279 | ||
280 | void __free_ep(struct kref *kref) | |
281 | { | |
874d8df5 SW |
282 | struct iwch_ep *ep; |
283 | ep = container_of(container_of(kref, struct iwch_ep_common, kref), | |
284 | struct iwch_ep, com); | |
285 | PDBG("%s ep %p state %s\n", __func__, ep, states[state_read(&ep->com)]); | |
6e47fe43 | 286 | if (test_bit(RELEASE_RESOURCES, &ep->com.flags)) { |
874d8df5 SW |
287 | cxgb3_remove_tid(ep->com.tdev, (void *)ep, ep->hwtid); |
288 | dst_release(ep->dst); | |
e48f129c | 289 | l2t_release(ep->com.tdev, ep->l2t); |
874d8df5 SW |
290 | } |
291 | kfree(ep); | |
b038ced7 SW |
292 | } |
293 | ||
294 | static void release_ep_resources(struct iwch_ep *ep) | |
295 | { | |
33718363 | 296 | PDBG("%s ep %p tid %d\n", __func__, ep, ep->hwtid); |
6e47fe43 | 297 | set_bit(RELEASE_RESOURCES, &ep->com.flags); |
b038ced7 SW |
298 | put_ep(&ep->com); |
299 | } | |
300 | ||
b038ced7 SW |
301 | static int status2errno(int status) |
302 | { | |
303 | switch (status) { | |
304 | case CPL_ERR_NONE: | |
305 | return 0; | |
306 | case CPL_ERR_CONN_RESET: | |
307 | return -ECONNRESET; | |
308 | case CPL_ERR_ARP_MISS: | |
309 | return -EHOSTUNREACH; | |
310 | case CPL_ERR_CONN_TIMEDOUT: | |
311 | return -ETIMEDOUT; | |
312 | case CPL_ERR_TCAM_FULL: | |
313 | return -ENOMEM; | |
314 | case CPL_ERR_CONN_EXIST: | |
315 | return -EADDRINUSE; | |
316 | default: | |
317 | return -EIO; | |
318 | } | |
319 | } | |
320 | ||
321 | /* | |
322 | * Try and reuse skbs already allocated... | |
323 | */ | |
324 | static struct sk_buff *get_skb(struct sk_buff *skb, int len, gfp_t gfp) | |
325 | { | |
1f6a849b | 326 | if (skb && !skb_is_nonlinear(skb) && !skb_cloned(skb)) { |
b038ced7 SW |
327 | skb_trim(skb, 0); |
328 | skb_get(skb); | |
329 | } else { | |
330 | skb = alloc_skb(len, gfp); | |
331 | } | |
332 | return skb; | |
333 | } | |
334 | ||
335 | static struct rtable *find_route(struct t3cdev *dev, __be32 local_ip, | |
336 | __be32 peer_ip, __be16 local_port, | |
337 | __be16 peer_port, u8 tos) | |
338 | { | |
339 | struct rtable *rt; | |
31e4543d | 340 | struct flowi4 fl4; |
78fbfd8a | 341 | |
31e4543d | 342 | rt = ip_route_output_ports(&init_net, &fl4, NULL, peer_ip, local_ip, |
78fbfd8a DM |
343 | peer_port, local_port, IPPROTO_TCP, |
344 | tos, 0); | |
b23dd4fe | 345 | if (IS_ERR(rt)) |
b038ced7 SW |
346 | return NULL; |
347 | return rt; | |
348 | } | |
349 | ||
350 | static unsigned int find_best_mtu(const struct t3c_data *d, unsigned short mtu) | |
351 | { | |
352 | int i = 0; | |
353 | ||
354 | while (i < d->nmtus - 1 && d->mtus[i + 1] <= mtu) | |
355 | ++i; | |
356 | return i; | |
357 | } | |
358 | ||
359 | static void arp_failure_discard(struct t3cdev *dev, struct sk_buff *skb) | |
360 | { | |
33718363 | 361 | PDBG("%s t3cdev %p\n", __func__, dev); |
b038ced7 SW |
362 | kfree_skb(skb); |
363 | } | |
364 | ||
365 | /* | |
366 | * Handle an ARP failure for an active open. | |
367 | */ | |
368 | static void act_open_req_arp_failure(struct t3cdev *dev, struct sk_buff *skb) | |
369 | { | |
370 | printk(KERN_ERR MOD "ARP failure duing connect\n"); | |
371 | kfree_skb(skb); | |
372 | } | |
373 | ||
374 | /* | |
375 | * Handle an ARP failure for a CPL_ABORT_REQ. Change it into a no RST variant | |
376 | * and send it along. | |
377 | */ | |
378 | static void abort_arp_failure(struct t3cdev *dev, struct sk_buff *skb) | |
379 | { | |
380 | struct cpl_abort_req *req = cplhdr(skb); | |
381 | ||
33718363 | 382 | PDBG("%s t3cdev %p\n", __func__, dev); |
b038ced7 | 383 | req->cmd = CPL_ABORT_NO_RST; |
04b5d028 | 384 | iwch_cxgb3_ofld_send(dev, skb); |
b038ced7 SW |
385 | } |
386 | ||
387 | static int send_halfclose(struct iwch_ep *ep, gfp_t gfp) | |
388 | { | |
389 | struct cpl_close_con_req *req; | |
390 | struct sk_buff *skb; | |
391 | ||
33718363 | 392 | PDBG("%s ep %p\n", __func__, ep); |
b038ced7 SW |
393 | skb = get_skb(NULL, sizeof(*req), gfp); |
394 | if (!skb) { | |
33718363 | 395 | printk(KERN_ERR MOD "%s - failed to alloc skb\n", __func__); |
b038ced7 SW |
396 | return -ENOMEM; |
397 | } | |
398 | skb->priority = CPL_PRIORITY_DATA; | |
399 | set_arp_failure_handler(skb, arp_failure_discard); | |
400 | req = (struct cpl_close_con_req *) skb_put(skb, sizeof(*req)); | |
401 | req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_OFLD_CLOSE_CON)); | |
402 | req->wr.wr_lo = htonl(V_WR_TID(ep->hwtid)); | |
403 | OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_CLOSE_CON_REQ, ep->hwtid)); | |
04b5d028 | 404 | return iwch_l2t_send(ep->com.tdev, skb, ep->l2t); |
b038ced7 SW |
405 | } |
406 | ||
407 | static int send_abort(struct iwch_ep *ep, struct sk_buff *skb, gfp_t gfp) | |
408 | { | |
409 | struct cpl_abort_req *req; | |
410 | ||
33718363 | 411 | PDBG("%s ep %p\n", __func__, ep); |
b038ced7 SW |
412 | skb = get_skb(skb, sizeof(*req), gfp); |
413 | if (!skb) { | |
414 | printk(KERN_ERR MOD "%s - failed to alloc skb.\n", | |
33718363 | 415 | __func__); |
b038ced7 SW |
416 | return -ENOMEM; |
417 | } | |
418 | skb->priority = CPL_PRIORITY_DATA; | |
419 | set_arp_failure_handler(skb, abort_arp_failure); | |
420 | req = (struct cpl_abort_req *) skb_put(skb, sizeof(*req)); | |
e4514cbd | 421 | memset(req, 0, sizeof(*req)); |
b038ced7 SW |
422 | req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_OFLD_HOST_ABORT_CON_REQ)); |
423 | req->wr.wr_lo = htonl(V_WR_TID(ep->hwtid)); | |
424 | OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_ABORT_REQ, ep->hwtid)); | |
425 | req->cmd = CPL_ABORT_SEND_RST; | |
04b5d028 | 426 | return iwch_l2t_send(ep->com.tdev, skb, ep->l2t); |
b038ced7 SW |
427 | } |
428 | ||
429 | static int send_connect(struct iwch_ep *ep) | |
430 | { | |
431 | struct cpl_act_open_req *req; | |
432 | struct sk_buff *skb; | |
433 | u32 opt0h, opt0l, opt2; | |
434 | unsigned int mtu_idx; | |
435 | int wscale; | |
436 | ||
33718363 | 437 | PDBG("%s ep %p\n", __func__, ep); |
b038ced7 SW |
438 | |
439 | skb = get_skb(NULL, sizeof(*req), GFP_KERNEL); | |
440 | if (!skb) { | |
441 | printk(KERN_ERR MOD "%s - failed to alloc skb.\n", | |
33718363 | 442 | __func__); |
b038ced7 SW |
443 | return -ENOMEM; |
444 | } | |
445 | mtu_idx = find_best_mtu(T3C_DATA(ep->com.tdev), dst_mtu(ep->dst)); | |
446 | wscale = compute_wscale(rcv_win); | |
447 | opt0h = V_NAGLE(0) | | |
448 | V_NO_CONG(nocong) | | |
449 | V_KEEP_ALIVE(1) | | |
450 | F_TCAM_BYPASS | | |
451 | V_WND_SCALE(wscale) | | |
452 | V_MSS_IDX(mtu_idx) | | |
453 | V_L2T_IDX(ep->l2t->idx) | V_TX_CHANNEL(ep->l2t->smt_idx); | |
454 | opt0l = V_TOS((ep->tos >> 2) & M_TOS) | V_RCV_BUFSIZ(rcv_win>>10); | |
bec658ff SW |
455 | opt2 = F_RX_COALESCE_VALID | V_RX_COALESCE(0) | V_FLAVORS_VALID(1) | |
456 | V_CONG_CONTROL_FLAVOR(cong_flavor); | |
b038ced7 SW |
457 | skb->priority = CPL_PRIORITY_SETUP; |
458 | set_arp_failure_handler(skb, act_open_req_arp_failure); | |
459 | ||
460 | req = (struct cpl_act_open_req *) skb_put(skb, sizeof(*req)); | |
461 | req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_FORWARD)); | |
462 | OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_ACT_OPEN_REQ, ep->atid)); | |
463 | req->local_port = ep->com.local_addr.sin_port; | |
464 | req->peer_port = ep->com.remote_addr.sin_port; | |
465 | req->local_ip = ep->com.local_addr.sin_addr.s_addr; | |
466 | req->peer_ip = ep->com.remote_addr.sin_addr.s_addr; | |
467 | req->opt0h = htonl(opt0h); | |
468 | req->opt0l = htonl(opt0l); | |
469 | req->params = 0; | |
470 | req->opt2 = htonl(opt2); | |
04b5d028 | 471 | return iwch_l2t_send(ep->com.tdev, skb, ep->l2t); |
b038ced7 SW |
472 | } |
473 | ||
474 | static void send_mpa_req(struct iwch_ep *ep, struct sk_buff *skb) | |
475 | { | |
476 | int mpalen; | |
477 | struct tx_data_wr *req; | |
478 | struct mpa_message *mpa; | |
479 | int len; | |
480 | ||
33718363 | 481 | PDBG("%s ep %p pd_len %d\n", __func__, ep, ep->plen); |
b038ced7 SW |
482 | |
483 | BUG_ON(skb_cloned(skb)); | |
484 | ||
485 | mpalen = sizeof(*mpa) + ep->plen; | |
4305b541 | 486 | if (skb->data + mpalen + sizeof(*req) > skb_end_pointer(skb)) { |
b038ced7 SW |
487 | kfree_skb(skb); |
488 | skb=alloc_skb(mpalen + sizeof(*req), GFP_KERNEL); | |
489 | if (!skb) { | |
490 | connect_reply_upcall(ep, -ENOMEM); | |
491 | return; | |
492 | } | |
493 | } | |
494 | skb_trim(skb, 0); | |
495 | skb_reserve(skb, sizeof(*req)); | |
496 | skb_put(skb, mpalen); | |
497 | skb->priority = CPL_PRIORITY_DATA; | |
498 | mpa = (struct mpa_message *) skb->data; | |
499 | memset(mpa, 0, sizeof(*mpa)); | |
500 | memcpy(mpa->key, MPA_KEY_REQ, sizeof(mpa->key)); | |
501 | mpa->flags = (crc_enabled ? MPA_CRC : 0) | | |
502 | (markers_enabled ? MPA_MARKERS : 0); | |
503 | mpa->private_data_size = htons(ep->plen); | |
504 | mpa->revision = mpa_rev; | |
505 | ||
506 | if (ep->plen) | |
507 | memcpy(mpa->private_data, ep->mpa_pkt + sizeof(*mpa), ep->plen); | |
508 | ||
509 | /* | |
510 | * Reference the mpa skb. This ensures the data area | |
511 | * will remain in memory until the hw acks the tx. | |
512 | * Function tx_ack() will deref it. | |
513 | */ | |
514 | skb_get(skb); | |
515 | set_arp_failure_handler(skb, arp_failure_discard); | |
badff6d0 | 516 | skb_reset_transport_header(skb); |
b038ced7 SW |
517 | len = skb->len; |
518 | req = (struct tx_data_wr *) skb_push(skb, sizeof(*req)); | |
f8b0dfd1 | 519 | req->wr_hi = htonl(V_WR_OP(FW_WROPCODE_OFLD_TX_DATA)|F_WR_COMPL); |
b038ced7 SW |
520 | req->wr_lo = htonl(V_WR_TID(ep->hwtid)); |
521 | req->len = htonl(len); | |
522 | req->param = htonl(V_TX_PORT(ep->l2t->smt_idx) | | |
523 | V_TX_SNDBUF(snd_win>>15)); | |
de3d3530 | 524 | req->flags = htonl(F_TX_INIT); |
b038ced7 SW |
525 | req->sndseq = htonl(ep->snd_seq); |
526 | BUG_ON(ep->mpa_skb); | |
527 | ep->mpa_skb = skb; | |
04b5d028 | 528 | iwch_l2t_send(ep->com.tdev, skb, ep->l2t); |
b038ced7 SW |
529 | start_ep_timer(ep); |
530 | state_set(&ep->com, MPA_REQ_SENT); | |
531 | return; | |
532 | } | |
533 | ||
534 | static int send_mpa_reject(struct iwch_ep *ep, const void *pdata, u8 plen) | |
535 | { | |
536 | int mpalen; | |
537 | struct tx_data_wr *req; | |
538 | struct mpa_message *mpa; | |
539 | struct sk_buff *skb; | |
540 | ||
33718363 | 541 | PDBG("%s ep %p plen %d\n", __func__, ep, plen); |
b038ced7 SW |
542 | |
543 | mpalen = sizeof(*mpa) + plen; | |
544 | ||
545 | skb = get_skb(NULL, mpalen + sizeof(*req), GFP_KERNEL); | |
546 | if (!skb) { | |
33718363 | 547 | printk(KERN_ERR MOD "%s - cannot alloc skb!\n", __func__); |
b038ced7 SW |
548 | return -ENOMEM; |
549 | } | |
550 | skb_reserve(skb, sizeof(*req)); | |
551 | mpa = (struct mpa_message *) skb_put(skb, mpalen); | |
552 | memset(mpa, 0, sizeof(*mpa)); | |
553 | memcpy(mpa->key, MPA_KEY_REP, sizeof(mpa->key)); | |
554 | mpa->flags = MPA_REJECT; | |
555 | mpa->revision = mpa_rev; | |
556 | mpa->private_data_size = htons(plen); | |
557 | if (plen) | |
558 | memcpy(mpa->private_data, pdata, plen); | |
559 | ||
560 | /* | |
561 | * Reference the mpa skb again. This ensures the data area | |
562 | * will remain in memory until the hw acks the tx. | |
563 | * Function tx_ack() will deref it. | |
564 | */ | |
565 | skb_get(skb); | |
566 | skb->priority = CPL_PRIORITY_DATA; | |
567 | set_arp_failure_handler(skb, arp_failure_discard); | |
badff6d0 | 568 | skb_reset_transport_header(skb); |
b038ced7 | 569 | req = (struct tx_data_wr *) skb_push(skb, sizeof(*req)); |
f8b0dfd1 | 570 | req->wr_hi = htonl(V_WR_OP(FW_WROPCODE_OFLD_TX_DATA)|F_WR_COMPL); |
b038ced7 SW |
571 | req->wr_lo = htonl(V_WR_TID(ep->hwtid)); |
572 | req->len = htonl(mpalen); | |
573 | req->param = htonl(V_TX_PORT(ep->l2t->smt_idx) | | |
574 | V_TX_SNDBUF(snd_win>>15)); | |
de3d3530 | 575 | req->flags = htonl(F_TX_INIT); |
b038ced7 SW |
576 | req->sndseq = htonl(ep->snd_seq); |
577 | BUG_ON(ep->mpa_skb); | |
578 | ep->mpa_skb = skb; | |
04b5d028 | 579 | return iwch_l2t_send(ep->com.tdev, skb, ep->l2t); |
b038ced7 SW |
580 | } |
581 | ||
582 | static int send_mpa_reply(struct iwch_ep *ep, const void *pdata, u8 plen) | |
583 | { | |
584 | int mpalen; | |
585 | struct tx_data_wr *req; | |
586 | struct mpa_message *mpa; | |
587 | int len; | |
588 | struct sk_buff *skb; | |
589 | ||
33718363 | 590 | PDBG("%s ep %p plen %d\n", __func__, ep, plen); |
b038ced7 SW |
591 | |
592 | mpalen = sizeof(*mpa) + plen; | |
593 | ||
594 | skb = get_skb(NULL, mpalen + sizeof(*req), GFP_KERNEL); | |
595 | if (!skb) { | |
33718363 | 596 | printk(KERN_ERR MOD "%s - cannot alloc skb!\n", __func__); |
b038ced7 SW |
597 | return -ENOMEM; |
598 | } | |
599 | skb->priority = CPL_PRIORITY_DATA; | |
600 | skb_reserve(skb, sizeof(*req)); | |
601 | mpa = (struct mpa_message *) skb_put(skb, mpalen); | |
602 | memset(mpa, 0, sizeof(*mpa)); | |
603 | memcpy(mpa->key, MPA_KEY_REP, sizeof(mpa->key)); | |
604 | mpa->flags = (ep->mpa_attr.crc_enabled ? MPA_CRC : 0) | | |
605 | (markers_enabled ? MPA_MARKERS : 0); | |
606 | mpa->revision = mpa_rev; | |
607 | mpa->private_data_size = htons(plen); | |
608 | if (plen) | |
609 | memcpy(mpa->private_data, pdata, plen); | |
610 | ||
611 | /* | |
612 | * Reference the mpa skb. This ensures the data area | |
613 | * will remain in memory until the hw acks the tx. | |
614 | * Function tx_ack() will deref it. | |
615 | */ | |
616 | skb_get(skb); | |
617 | set_arp_failure_handler(skb, arp_failure_discard); | |
badff6d0 | 618 | skb_reset_transport_header(skb); |
b038ced7 SW |
619 | len = skb->len; |
620 | req = (struct tx_data_wr *) skb_push(skb, sizeof(*req)); | |
f8b0dfd1 | 621 | req->wr_hi = htonl(V_WR_OP(FW_WROPCODE_OFLD_TX_DATA)|F_WR_COMPL); |
b038ced7 SW |
622 | req->wr_lo = htonl(V_WR_TID(ep->hwtid)); |
623 | req->len = htonl(len); | |
624 | req->param = htonl(V_TX_PORT(ep->l2t->smt_idx) | | |
625 | V_TX_SNDBUF(snd_win>>15)); | |
de3d3530 | 626 | req->flags = htonl(F_TX_INIT); |
b038ced7 SW |
627 | req->sndseq = htonl(ep->snd_seq); |
628 | ep->mpa_skb = skb; | |
629 | state_set(&ep->com, MPA_REP_SENT); | |
04b5d028 | 630 | return iwch_l2t_send(ep->com.tdev, skb, ep->l2t); |
b038ced7 SW |
631 | } |
632 | ||
633 | static int act_establish(struct t3cdev *tdev, struct sk_buff *skb, void *ctx) | |
634 | { | |
635 | struct iwch_ep *ep = ctx; | |
636 | struct cpl_act_establish *req = cplhdr(skb); | |
637 | unsigned int tid = GET_TID(req); | |
638 | ||
33718363 | 639 | PDBG("%s ep %p tid %d\n", __func__, ep, tid); |
b038ced7 SW |
640 | |
641 | dst_confirm(ep->dst); | |
642 | ||
643 | /* setup the hwtid for this connection */ | |
644 | ep->hwtid = tid; | |
645 | cxgb3_insert_tid(ep->com.tdev, &t3c_client, ep, tid); | |
646 | ||
647 | ep->snd_seq = ntohl(req->snd_isn); | |
de3d3530 | 648 | ep->rcv_seq = ntohl(req->rcv_isn); |
b038ced7 SW |
649 | |
650 | set_emss(ep, ntohs(req->tcp_opt)); | |
651 | ||
652 | /* dealloc the atid */ | |
653 | cxgb3_free_atid(ep->com.tdev, ep->atid); | |
654 | ||
655 | /* start MPA negotiation */ | |
656 | send_mpa_req(ep, skb); | |
657 | ||
658 | return 0; | |
659 | } | |
660 | ||
661 | static void abort_connection(struct iwch_ep *ep, struct sk_buff *skb, gfp_t gfp) | |
662 | { | |
663 | PDBG("%s ep %p\n", __FILE__, ep); | |
664 | state_set(&ep->com, ABORTING); | |
665 | send_abort(ep, skb, gfp); | |
666 | } | |
667 | ||
668 | static void close_complete_upcall(struct iwch_ep *ep) | |
669 | { | |
670 | struct iw_cm_event event; | |
671 | ||
33718363 | 672 | PDBG("%s ep %p\n", __func__, ep); |
b038ced7 SW |
673 | memset(&event, 0, sizeof(event)); |
674 | event.event = IW_CM_EVENT_CLOSE; | |
675 | if (ep->com.cm_id) { | |
676 | PDBG("close complete delivered ep %p cm_id %p tid %d\n", | |
677 | ep, ep->com.cm_id, ep->hwtid); | |
678 | ep->com.cm_id->event_handler(ep->com.cm_id, &event); | |
679 | ep->com.cm_id->rem_ref(ep->com.cm_id); | |
680 | ep->com.cm_id = NULL; | |
681 | ep->com.qp = NULL; | |
682 | } | |
683 | } | |
684 | ||
685 | static void peer_close_upcall(struct iwch_ep *ep) | |
686 | { | |
687 | struct iw_cm_event event; | |
688 | ||
33718363 | 689 | PDBG("%s ep %p\n", __func__, ep); |
b038ced7 SW |
690 | memset(&event, 0, sizeof(event)); |
691 | event.event = IW_CM_EVENT_DISCONNECT; | |
692 | if (ep->com.cm_id) { | |
693 | PDBG("peer close delivered ep %p cm_id %p tid %d\n", | |
694 | ep, ep->com.cm_id, ep->hwtid); | |
695 | ep->com.cm_id->event_handler(ep->com.cm_id, &event); | |
696 | } | |
697 | } | |
698 | ||
699 | static void peer_abort_upcall(struct iwch_ep *ep) | |
700 | { | |
701 | struct iw_cm_event event; | |
702 | ||
33718363 | 703 | PDBG("%s ep %p\n", __func__, ep); |
b038ced7 SW |
704 | memset(&event, 0, sizeof(event)); |
705 | event.event = IW_CM_EVENT_CLOSE; | |
706 | event.status = -ECONNRESET; | |
707 | if (ep->com.cm_id) { | |
708 | PDBG("abort delivered ep %p cm_id %p tid %d\n", ep, | |
709 | ep->com.cm_id, ep->hwtid); | |
710 | ep->com.cm_id->event_handler(ep->com.cm_id, &event); | |
711 | ep->com.cm_id->rem_ref(ep->com.cm_id); | |
712 | ep->com.cm_id = NULL; | |
713 | ep->com.qp = NULL; | |
714 | } | |
715 | } | |
716 | ||
717 | static void connect_reply_upcall(struct iwch_ep *ep, int status) | |
718 | { | |
719 | struct iw_cm_event event; | |
720 | ||
33718363 | 721 | PDBG("%s ep %p status %d\n", __func__, ep, status); |
b038ced7 SW |
722 | memset(&event, 0, sizeof(event)); |
723 | event.event = IW_CM_EVENT_CONNECT_REPLY; | |
724 | event.status = status; | |
24d44a39 SW |
725 | memcpy(&event.local_addr, &ep->com.local_addr, |
726 | sizeof(ep->com.local_addr)); | |
727 | memcpy(&event.remote_addr, &ep->com.remote_addr, | |
728 | sizeof(ep->com.remote_addr)); | |
b038ced7 SW |
729 | |
730 | if ((status == 0) || (status == -ECONNREFUSED)) { | |
731 | event.private_data_len = ep->plen; | |
732 | event.private_data = ep->mpa_pkt + sizeof(struct mpa_message); | |
733 | } | |
734 | if (ep->com.cm_id) { | |
33718363 | 735 | PDBG("%s ep %p tid %d status %d\n", __func__, ep, |
b038ced7 SW |
736 | ep->hwtid, status); |
737 | ep->com.cm_id->event_handler(ep->com.cm_id, &event); | |
738 | } | |
739 | if (status < 0) { | |
740 | ep->com.cm_id->rem_ref(ep->com.cm_id); | |
741 | ep->com.cm_id = NULL; | |
742 | ep->com.qp = NULL; | |
743 | } | |
744 | } | |
745 | ||
746 | static void connect_request_upcall(struct iwch_ep *ep) | |
747 | { | |
748 | struct iw_cm_event event; | |
749 | ||
33718363 | 750 | PDBG("%s ep %p tid %d\n", __func__, ep, ep->hwtid); |
b038ced7 SW |
751 | memset(&event, 0, sizeof(event)); |
752 | event.event = IW_CM_EVENT_CONNECT_REQUEST; | |
24d44a39 SW |
753 | memcpy(&event.local_addr, &ep->com.local_addr, |
754 | sizeof(ep->com.local_addr)); | |
755 | memcpy(&event.remote_addr, &ep->com.remote_addr, | |
756 | sizeof(ep->com.local_addr)); | |
b038ced7 SW |
757 | event.private_data_len = ep->plen; |
758 | event.private_data = ep->mpa_pkt + sizeof(struct mpa_message); | |
759 | event.provider_data = ep; | |
56da00fc KS |
760 | /* |
761 | * Until ird/ord negotiation via MPAv2 support is added, send max | |
762 | * supported values | |
763 | */ | |
764 | event.ird = event.ord = 8; | |
6e47fe43 SW |
765 | if (state_read(&ep->parent_ep->com) != DEAD) { |
766 | get_ep(&ep->com); | |
b038ced7 SW |
767 | ep->parent_ep->com.cm_id->event_handler( |
768 | ep->parent_ep->com.cm_id, | |
769 | &event); | |
6e47fe43 | 770 | } |
b038ced7 SW |
771 | put_ep(&ep->parent_ep->com); |
772 | ep->parent_ep = NULL; | |
773 | } | |
774 | ||
775 | static void established_upcall(struct iwch_ep *ep) | |
776 | { | |
777 | struct iw_cm_event event; | |
778 | ||
33718363 | 779 | PDBG("%s ep %p\n", __func__, ep); |
b038ced7 SW |
780 | memset(&event, 0, sizeof(event)); |
781 | event.event = IW_CM_EVENT_ESTABLISHED; | |
56da00fc KS |
782 | /* |
783 | * Until ird/ord negotiation via MPAv2 support is added, send max | |
784 | * supported values | |
785 | */ | |
786 | event.ird = event.ord = 8; | |
b038ced7 | 787 | if (ep->com.cm_id) { |
33718363 | 788 | PDBG("%s ep %p tid %d\n", __func__, ep, ep->hwtid); |
b038ced7 SW |
789 | ep->com.cm_id->event_handler(ep->com.cm_id, &event); |
790 | } | |
791 | } | |
792 | ||
793 | static int update_rx_credits(struct iwch_ep *ep, u32 credits) | |
794 | { | |
795 | struct cpl_rx_data_ack *req; | |
796 | struct sk_buff *skb; | |
797 | ||
33718363 | 798 | PDBG("%s ep %p credits %u\n", __func__, ep, credits); |
b038ced7 SW |
799 | skb = get_skb(NULL, sizeof(*req), GFP_KERNEL); |
800 | if (!skb) { | |
801 | printk(KERN_ERR MOD "update_rx_credits - cannot alloc skb!\n"); | |
802 | return 0; | |
803 | } | |
804 | ||
805 | req = (struct cpl_rx_data_ack *) skb_put(skb, sizeof(*req)); | |
806 | req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_FORWARD)); | |
807 | OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_RX_DATA_ACK, ep->hwtid)); | |
808 | req->credit_dack = htonl(V_RX_CREDITS(credits) | V_RX_FORCE_ACK(1)); | |
809 | skb->priority = CPL_PRIORITY_ACK; | |
04b5d028 | 810 | iwch_cxgb3_ofld_send(ep->com.tdev, skb); |
b038ced7 SW |
811 | return credits; |
812 | } | |
813 | ||
814 | static void process_mpa_reply(struct iwch_ep *ep, struct sk_buff *skb) | |
815 | { | |
816 | struct mpa_message *mpa; | |
817 | u16 plen; | |
818 | struct iwch_qp_attributes attrs; | |
819 | enum iwch_qp_attr_mask mask; | |
820 | int err; | |
821 | ||
33718363 | 822 | PDBG("%s ep %p\n", __func__, ep); |
b038ced7 SW |
823 | |
824 | /* | |
825 | * Stop mpa timer. If it expired, then the state has | |
826 | * changed and we bail since ep_timeout already aborted | |
827 | * the connection. | |
828 | */ | |
829 | stop_ep_timer(ep); | |
830 | if (state_read(&ep->com) != MPA_REQ_SENT) | |
831 | return; | |
832 | ||
833 | /* | |
834 | * If we get more than the supported amount of private data | |
835 | * then we must fail this connection. | |
836 | */ | |
837 | if (ep->mpa_pkt_len + skb->len > sizeof(ep->mpa_pkt)) { | |
838 | err = -EINVAL; | |
839 | goto err; | |
840 | } | |
841 | ||
842 | /* | |
843 | * copy the new data into our accumulation buffer. | |
844 | */ | |
d626f62b ACM |
845 | skb_copy_from_linear_data(skb, &(ep->mpa_pkt[ep->mpa_pkt_len]), |
846 | skb->len); | |
b038ced7 SW |
847 | ep->mpa_pkt_len += skb->len; |
848 | ||
849 | /* | |
850 | * if we don't even have the mpa message, then bail. | |
851 | */ | |
852 | if (ep->mpa_pkt_len < sizeof(*mpa)) | |
853 | return; | |
854 | mpa = (struct mpa_message *) ep->mpa_pkt; | |
855 | ||
856 | /* Validate MPA header. */ | |
857 | if (mpa->revision != mpa_rev) { | |
858 | err = -EPROTO; | |
859 | goto err; | |
860 | } | |
861 | if (memcmp(mpa->key, MPA_KEY_REP, sizeof(mpa->key))) { | |
862 | err = -EPROTO; | |
863 | goto err; | |
864 | } | |
865 | ||
866 | plen = ntohs(mpa->private_data_size); | |
867 | ||
868 | /* | |
869 | * Fail if there's too much private data. | |
870 | */ | |
871 | if (plen > MPA_MAX_PRIVATE_DATA) { | |
872 | err = -EPROTO; | |
873 | goto err; | |
874 | } | |
875 | ||
876 | /* | |
877 | * If plen does not account for pkt size | |
878 | */ | |
879 | if (ep->mpa_pkt_len > (sizeof(*mpa) + plen)) { | |
880 | err = -EPROTO; | |
881 | goto err; | |
882 | } | |
883 | ||
884 | ep->plen = (u8) plen; | |
885 | ||
886 | /* | |
887 | * If we don't have all the pdata yet, then bail. | |
888 | * We'll continue process when more data arrives. | |
889 | */ | |
890 | if (ep->mpa_pkt_len < (sizeof(*mpa) + plen)) | |
891 | return; | |
892 | ||
893 | if (mpa->flags & MPA_REJECT) { | |
894 | err = -ECONNREFUSED; | |
895 | goto err; | |
896 | } | |
897 | ||
898 | /* | |
899 | * If we get here we have accumulated the entire mpa | |
900 | * start reply message including private data. And | |
901 | * the MPA header is valid. | |
902 | */ | |
903 | state_set(&ep->com, FPDU_MODE); | |
f8b0dfd1 | 904 | ep->mpa_attr.initiator = 1; |
b038ced7 SW |
905 | ep->mpa_attr.crc_enabled = (mpa->flags & MPA_CRC) | crc_enabled ? 1 : 0; |
906 | ep->mpa_attr.recv_marker_enabled = markers_enabled; | |
907 | ep->mpa_attr.xmit_marker_enabled = mpa->flags & MPA_MARKERS ? 1 : 0; | |
908 | ep->mpa_attr.version = mpa_rev; | |
909 | PDBG("%s - crc_enabled=%d, recv_marker_enabled=%d, " | |
33718363 | 910 | "xmit_marker_enabled=%d, version=%d\n", __func__, |
b038ced7 SW |
911 | ep->mpa_attr.crc_enabled, ep->mpa_attr.recv_marker_enabled, |
912 | ep->mpa_attr.xmit_marker_enabled, ep->mpa_attr.version); | |
913 | ||
914 | attrs.mpa_attr = ep->mpa_attr; | |
915 | attrs.max_ird = ep->ird; | |
916 | attrs.max_ord = ep->ord; | |
917 | attrs.llp_stream_handle = ep; | |
918 | attrs.next_state = IWCH_QP_STATE_RTS; | |
919 | ||
920 | mask = IWCH_QP_ATTR_NEXT_STATE | | |
921 | IWCH_QP_ATTR_LLP_STREAM_HANDLE | IWCH_QP_ATTR_MPA_ATTR | | |
922 | IWCH_QP_ATTR_MAX_IRD | IWCH_QP_ATTR_MAX_ORD; | |
923 | ||
924 | /* bind QP and TID with INIT_WR */ | |
925 | err = iwch_modify_qp(ep->com.qp->rhp, | |
926 | ep->com.qp, mask, &attrs, 1); | |
f8b0dfd1 SW |
927 | if (err) |
928 | goto err; | |
929 | ||
930 | if (peer2peer && iwch_rqes_posted(ep->com.qp) == 0) { | |
80783868 | 931 | iwch_post_zb_read(ep); |
f8b0dfd1 SW |
932 | } |
933 | ||
934 | goto out; | |
b038ced7 SW |
935 | err: |
936 | abort_connection(ep, skb, GFP_KERNEL); | |
937 | out: | |
938 | connect_reply_upcall(ep, err); | |
939 | return; | |
940 | } | |
941 | ||
942 | static void process_mpa_request(struct iwch_ep *ep, struct sk_buff *skb) | |
943 | { | |
944 | struct mpa_message *mpa; | |
945 | u16 plen; | |
946 | ||
33718363 | 947 | PDBG("%s ep %p\n", __func__, ep); |
b038ced7 SW |
948 | |
949 | /* | |
950 | * Stop mpa timer. If it expired, then the state has | |
951 | * changed and we bail since ep_timeout already aborted | |
952 | * the connection. | |
953 | */ | |
954 | stop_ep_timer(ep); | |
955 | if (state_read(&ep->com) != MPA_REQ_WAIT) | |
956 | return; | |
957 | ||
958 | /* | |
959 | * If we get more than the supported amount of private data | |
960 | * then we must fail this connection. | |
961 | */ | |
962 | if (ep->mpa_pkt_len + skb->len > sizeof(ep->mpa_pkt)) { | |
963 | abort_connection(ep, skb, GFP_KERNEL); | |
964 | return; | |
965 | } | |
966 | ||
33718363 | 967 | PDBG("%s enter (%s line %u)\n", __func__, __FILE__, __LINE__); |
b038ced7 SW |
968 | |
969 | /* | |
970 | * Copy the new data into our accumulation buffer. | |
971 | */ | |
d626f62b ACM |
972 | skb_copy_from_linear_data(skb, &(ep->mpa_pkt[ep->mpa_pkt_len]), |
973 | skb->len); | |
b038ced7 SW |
974 | ep->mpa_pkt_len += skb->len; |
975 | ||
976 | /* | |
977 | * If we don't even have the mpa message, then bail. | |
978 | * We'll continue process when more data arrives. | |
979 | */ | |
980 | if (ep->mpa_pkt_len < sizeof(*mpa)) | |
981 | return; | |
33718363 | 982 | PDBG("%s enter (%s line %u)\n", __func__, __FILE__, __LINE__); |
b038ced7 SW |
983 | mpa = (struct mpa_message *) ep->mpa_pkt; |
984 | ||
985 | /* | |
986 | * Validate MPA Header. | |
987 | */ | |
988 | if (mpa->revision != mpa_rev) { | |
989 | abort_connection(ep, skb, GFP_KERNEL); | |
990 | return; | |
991 | } | |
992 | ||
993 | if (memcmp(mpa->key, MPA_KEY_REQ, sizeof(mpa->key))) { | |
994 | abort_connection(ep, skb, GFP_KERNEL); | |
995 | return; | |
996 | } | |
997 | ||
998 | plen = ntohs(mpa->private_data_size); | |
999 | ||
1000 | /* | |
1001 | * Fail if there's too much private data. | |
1002 | */ | |
1003 | if (plen > MPA_MAX_PRIVATE_DATA) { | |
1004 | abort_connection(ep, skb, GFP_KERNEL); | |
1005 | return; | |
1006 | } | |
1007 | ||
1008 | /* | |
1009 | * If plen does not account for pkt size | |
1010 | */ | |
1011 | if (ep->mpa_pkt_len > (sizeof(*mpa) + plen)) { | |
1012 | abort_connection(ep, skb, GFP_KERNEL); | |
1013 | return; | |
1014 | } | |
1015 | ep->plen = (u8) plen; | |
1016 | ||
1017 | /* | |
1018 | * If we don't have all the pdata yet, then bail. | |
1019 | */ | |
1020 | if (ep->mpa_pkt_len < (sizeof(*mpa) + plen)) | |
1021 | return; | |
1022 | ||
1023 | /* | |
1024 | * If we get here we have accumulated the entire mpa | |
1025 | * start reply message including private data. | |
1026 | */ | |
f8b0dfd1 | 1027 | ep->mpa_attr.initiator = 0; |
b038ced7 SW |
1028 | ep->mpa_attr.crc_enabled = (mpa->flags & MPA_CRC) | crc_enabled ? 1 : 0; |
1029 | ep->mpa_attr.recv_marker_enabled = markers_enabled; | |
1030 | ep->mpa_attr.xmit_marker_enabled = mpa->flags & MPA_MARKERS ? 1 : 0; | |
1031 | ep->mpa_attr.version = mpa_rev; | |
1032 | PDBG("%s - crc_enabled=%d, recv_marker_enabled=%d, " | |
33718363 | 1033 | "xmit_marker_enabled=%d, version=%d\n", __func__, |
b038ced7 SW |
1034 | ep->mpa_attr.crc_enabled, ep->mpa_attr.recv_marker_enabled, |
1035 | ep->mpa_attr.xmit_marker_enabled, ep->mpa_attr.version); | |
1036 | ||
1037 | state_set(&ep->com, MPA_REQ_RCVD); | |
1038 | ||
1039 | /* drive upcall */ | |
1040 | connect_request_upcall(ep); | |
1041 | return; | |
1042 | } | |
1043 | ||
1044 | static int rx_data(struct t3cdev *tdev, struct sk_buff *skb, void *ctx) | |
1045 | { | |
1046 | struct iwch_ep *ep = ctx; | |
1047 | struct cpl_rx_data *hdr = cplhdr(skb); | |
1048 | unsigned int dlen = ntohs(hdr->len); | |
1049 | ||
33718363 | 1050 | PDBG("%s ep %p dlen %u\n", __func__, ep, dlen); |
b038ced7 SW |
1051 | |
1052 | skb_pull(skb, sizeof(*hdr)); | |
1053 | skb_trim(skb, dlen); | |
1054 | ||
de3d3530 SW |
1055 | ep->rcv_seq += dlen; |
1056 | BUG_ON(ep->rcv_seq != (ntohl(hdr->seq) + dlen)); | |
1057 | ||
b038ced7 SW |
1058 | switch (state_read(&ep->com)) { |
1059 | case MPA_REQ_SENT: | |
1060 | process_mpa_reply(ep, skb); | |
1061 | break; | |
1062 | case MPA_REQ_WAIT: | |
1063 | process_mpa_request(ep, skb); | |
1064 | break; | |
1065 | case MPA_REP_SENT: | |
1066 | break; | |
1067 | default: | |
1068 | printk(KERN_ERR MOD "%s Unexpected streaming data." | |
1069 | " ep %p state %d tid %d\n", | |
33718363 | 1070 | __func__, ep, state_read(&ep->com), ep->hwtid); |
b038ced7 SW |
1071 | |
1072 | /* | |
1073 | * The ep will timeout and inform the ULP of the failure. | |
1074 | * See ep_timeout(). | |
1075 | */ | |
1076 | break; | |
1077 | } | |
1078 | ||
1079 | /* update RX credits */ | |
1080 | update_rx_credits(ep, dlen); | |
1081 | ||
1082 | return CPL_RET_BUF_DONE; | |
1083 | } | |
1084 | ||
1085 | /* | |
1086 | * Upcall from the adapter indicating data has been transmitted. | |
1087 | * For us its just the single MPA request or reply. We can now free | |
1088 | * the skb holding the mpa message. | |
1089 | */ | |
1090 | static int tx_ack(struct t3cdev *tdev, struct sk_buff *skb, void *ctx) | |
1091 | { | |
1092 | struct iwch_ep *ep = ctx; | |
1093 | struct cpl_wr_ack *hdr = cplhdr(skb); | |
1094 | unsigned int credits = ntohs(hdr->credits); | |
80783868 SW |
1095 | unsigned long flags; |
1096 | int post_zb = 0; | |
b038ced7 | 1097 | |
33718363 | 1098 | PDBG("%s ep %p credits %u\n", __func__, ep, credits); |
b038ced7 | 1099 | |
f8b0dfd1 | 1100 | if (credits == 0) { |
ca7cf94f JP |
1101 | PDBG("%s 0 credit ack ep %p state %u\n", |
1102 | __func__, ep, state_read(&ep->com)); | |
b038ced7 | 1103 | return CPL_RET_BUF_DONE; |
f8b0dfd1 SW |
1104 | } |
1105 | ||
80783868 | 1106 | spin_lock_irqsave(&ep->com.lock, flags); |
b038ced7 | 1107 | BUG_ON(credits != 1); |
b038ced7 | 1108 | dst_confirm(ep->dst); |
f8b0dfd1 SW |
1109 | if (!ep->mpa_skb) { |
1110 | PDBG("%s rdma_init wr_ack ep %p state %u\n", | |
80783868 | 1111 | __func__, ep, ep->com.state); |
f8b0dfd1 SW |
1112 | if (ep->mpa_attr.initiator) { |
1113 | PDBG("%s initiator ep %p state %u\n", | |
80783868 SW |
1114 | __func__, ep, ep->com.state); |
1115 | if (peer2peer && ep->com.state == FPDU_MODE) | |
1116 | post_zb = 1; | |
f8b0dfd1 SW |
1117 | } else { |
1118 | PDBG("%s responder ep %p state %u\n", | |
80783868 SW |
1119 | __func__, ep, ep->com.state); |
1120 | if (ep->com.state == MPA_REQ_RCVD) { | |
1121 | ep->com.rpl_done = 1; | |
1122 | wake_up(&ep->com.waitq); | |
1123 | } | |
f8b0dfd1 SW |
1124 | } |
1125 | } else { | |
1126 | PDBG("%s lsm ack ep %p state %u freeing skb\n", | |
80783868 | 1127 | __func__, ep, ep->com.state); |
f8b0dfd1 SW |
1128 | kfree_skb(ep->mpa_skb); |
1129 | ep->mpa_skb = NULL; | |
b038ced7 | 1130 | } |
80783868 SW |
1131 | spin_unlock_irqrestore(&ep->com.lock, flags); |
1132 | if (post_zb) | |
1133 | iwch_post_zb_read(ep); | |
b038ced7 SW |
1134 | return CPL_RET_BUF_DONE; |
1135 | } | |
1136 | ||
1137 | static int abort_rpl(struct t3cdev *tdev, struct sk_buff *skb, void *ctx) | |
1138 | { | |
1139 | struct iwch_ep *ep = ctx; | |
989a1780 SW |
1140 | unsigned long flags; |
1141 | int release = 0; | |
b038ced7 | 1142 | |
33718363 | 1143 | PDBG("%s ep %p\n", __func__, ep); |
989a1780 | 1144 | BUG_ON(!ep); |
b038ced7 | 1145 | |
aff9e39d SW |
1146 | /* |
1147 | * We get 2 abort replies from the HW. The first one must | |
1148 | * be ignored except for scribbling that we need one more. | |
1149 | */ | |
6e47fe43 | 1150 | if (!test_and_set_bit(ABORT_REQ_IN_PROGRESS, &ep->com.flags)) { |
aff9e39d SW |
1151 | return CPL_RET_BUF_DONE; |
1152 | } | |
1153 | ||
989a1780 SW |
1154 | spin_lock_irqsave(&ep->com.lock, flags); |
1155 | switch (ep->com.state) { | |
1156 | case ABORTING: | |
1157 | close_complete_upcall(ep); | |
1158 | __state_set(&ep->com, DEAD); | |
1159 | release = 1; | |
1160 | break; | |
1161 | default: | |
1162 | printk(KERN_ERR "%s ep %p state %d\n", | |
1163 | __func__, ep, ep->com.state); | |
1164 | break; | |
1165 | } | |
1166 | spin_unlock_irqrestore(&ep->com.lock, flags); | |
1167 | ||
1168 | if (release) | |
1169 | release_ep_resources(ep); | |
b038ced7 SW |
1170 | return CPL_RET_BUF_DONE; |
1171 | } | |
1172 | ||
96d0e493 SW |
1173 | /* |
1174 | * Return whether a failed active open has allocated a TID | |
1175 | */ | |
1176 | static inline int act_open_has_tid(int status) | |
1177 | { | |
1178 | return status != CPL_ERR_TCAM_FULL && status != CPL_ERR_CONN_EXIST && | |
1179 | status != CPL_ERR_ARP_MISS; | |
1180 | } | |
1181 | ||
b038ced7 SW |
1182 | static int act_open_rpl(struct t3cdev *tdev, struct sk_buff *skb, void *ctx) |
1183 | { | |
1184 | struct iwch_ep *ep = ctx; | |
1185 | struct cpl_act_open_rpl *rpl = cplhdr(skb); | |
1186 | ||
33718363 | 1187 | PDBG("%s ep %p status %u errno %d\n", __func__, ep, rpl->status, |
b038ced7 SW |
1188 | status2errno(rpl->status)); |
1189 | connect_reply_upcall(ep, status2errno(rpl->status)); | |
1190 | state_set(&ep->com, DEAD); | |
8176d297 | 1191 | if (ep->com.tdev->type != T3A && act_open_has_tid(rpl->status)) |
b038ced7 SW |
1192 | release_tid(ep->com.tdev, GET_TID(rpl), NULL); |
1193 | cxgb3_free_atid(ep->com.tdev, ep->atid); | |
1194 | dst_release(ep->dst); | |
e48f129c | 1195 | l2t_release(ep->com.tdev, ep->l2t); |
b038ced7 SW |
1196 | put_ep(&ep->com); |
1197 | return CPL_RET_BUF_DONE; | |
1198 | } | |
1199 | ||
1200 | static int listen_start(struct iwch_listen_ep *ep) | |
1201 | { | |
1202 | struct sk_buff *skb; | |
1203 | struct cpl_pass_open_req *req; | |
1204 | ||
33718363 | 1205 | PDBG("%s ep %p\n", __func__, ep); |
b038ced7 SW |
1206 | skb = get_skb(NULL, sizeof(*req), GFP_KERNEL); |
1207 | if (!skb) { | |
1208 | printk(KERN_ERR MOD "t3c_listen_start failed to alloc skb!\n"); | |
1209 | return -ENOMEM; | |
1210 | } | |
1211 | ||
1212 | req = (struct cpl_pass_open_req *) skb_put(skb, sizeof(*req)); | |
1213 | req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_FORWARD)); | |
1214 | OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_PASS_OPEN_REQ, ep->stid)); | |
1215 | req->local_port = ep->com.local_addr.sin_port; | |
1216 | req->local_ip = ep->com.local_addr.sin_addr.s_addr; | |
1217 | req->peer_port = 0; | |
1218 | req->peer_ip = 0; | |
1219 | req->peer_netmask = 0; | |
1220 | req->opt0h = htonl(F_DELACK | F_TCAM_BYPASS); | |
1221 | req->opt0l = htonl(V_RCV_BUFSIZ(rcv_win>>10)); | |
1222 | req->opt1 = htonl(V_CONN_POLICY(CPL_CONN_POLICY_ASK)); | |
1223 | ||
1224 | skb->priority = 1; | |
04b5d028 | 1225 | return iwch_cxgb3_ofld_send(ep->com.tdev, skb); |
b038ced7 SW |
1226 | } |
1227 | ||
1228 | static int pass_open_rpl(struct t3cdev *tdev, struct sk_buff *skb, void *ctx) | |
1229 | { | |
1230 | struct iwch_listen_ep *ep = ctx; | |
1231 | struct cpl_pass_open_rpl *rpl = cplhdr(skb); | |
1232 | ||
33718363 | 1233 | PDBG("%s ep %p status %d error %d\n", __func__, ep, |
b038ced7 SW |
1234 | rpl->status, status2errno(rpl->status)); |
1235 | ep->com.rpl_err = status2errno(rpl->status); | |
1236 | ep->com.rpl_done = 1; | |
1237 | wake_up(&ep->com.waitq); | |
1238 | ||
1239 | return CPL_RET_BUF_DONE; | |
1240 | } | |
1241 | ||
1242 | static int listen_stop(struct iwch_listen_ep *ep) | |
1243 | { | |
1244 | struct sk_buff *skb; | |
1245 | struct cpl_close_listserv_req *req; | |
1246 | ||
33718363 | 1247 | PDBG("%s ep %p\n", __func__, ep); |
b038ced7 SW |
1248 | skb = get_skb(NULL, sizeof(*req), GFP_KERNEL); |
1249 | if (!skb) { | |
33718363 | 1250 | printk(KERN_ERR MOD "%s - failed to alloc skb\n", __func__); |
b038ced7 SW |
1251 | return -ENOMEM; |
1252 | } | |
1253 | req = (struct cpl_close_listserv_req *) skb_put(skb, sizeof(*req)); | |
1254 | req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_FORWARD)); | |
60be4b59 | 1255 | req->cpu_idx = 0; |
b038ced7 SW |
1256 | OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_CLOSE_LISTSRV_REQ, ep->stid)); |
1257 | skb->priority = 1; | |
04b5d028 | 1258 | return iwch_cxgb3_ofld_send(ep->com.tdev, skb); |
b038ced7 SW |
1259 | } |
1260 | ||
1261 | static int close_listsrv_rpl(struct t3cdev *tdev, struct sk_buff *skb, | |
1262 | void *ctx) | |
1263 | { | |
1264 | struct iwch_listen_ep *ep = ctx; | |
1265 | struct cpl_close_listserv_rpl *rpl = cplhdr(skb); | |
1266 | ||
33718363 | 1267 | PDBG("%s ep %p\n", __func__, ep); |
b038ced7 SW |
1268 | ep->com.rpl_err = status2errno(rpl->status); |
1269 | ep->com.rpl_done = 1; | |
1270 | wake_up(&ep->com.waitq); | |
1271 | return CPL_RET_BUF_DONE; | |
1272 | } | |
1273 | ||
1274 | static void accept_cr(struct iwch_ep *ep, __be32 peer_ip, struct sk_buff *skb) | |
1275 | { | |
1276 | struct cpl_pass_accept_rpl *rpl; | |
1277 | unsigned int mtu_idx; | |
1278 | u32 opt0h, opt0l, opt2; | |
1279 | int wscale; | |
1280 | ||
33718363 | 1281 | PDBG("%s ep %p\n", __func__, ep); |
b038ced7 SW |
1282 | BUG_ON(skb_cloned(skb)); |
1283 | skb_trim(skb, sizeof(*rpl)); | |
1284 | skb_get(skb); | |
1285 | mtu_idx = find_best_mtu(T3C_DATA(ep->com.tdev), dst_mtu(ep->dst)); | |
1286 | wscale = compute_wscale(rcv_win); | |
1287 | opt0h = V_NAGLE(0) | | |
1288 | V_NO_CONG(nocong) | | |
1289 | V_KEEP_ALIVE(1) | | |
1290 | F_TCAM_BYPASS | | |
1291 | V_WND_SCALE(wscale) | | |
1292 | V_MSS_IDX(mtu_idx) | | |
1293 | V_L2T_IDX(ep->l2t->idx) | V_TX_CHANNEL(ep->l2t->smt_idx); | |
1294 | opt0l = V_TOS((ep->tos >> 2) & M_TOS) | V_RCV_BUFSIZ(rcv_win>>10); | |
bec658ff SW |
1295 | opt2 = F_RX_COALESCE_VALID | V_RX_COALESCE(0) | V_FLAVORS_VALID(1) | |
1296 | V_CONG_CONTROL_FLAVOR(cong_flavor); | |
b038ced7 SW |
1297 | |
1298 | rpl = cplhdr(skb); | |
1299 | rpl->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_FORWARD)); | |
1300 | OPCODE_TID(rpl) = htonl(MK_OPCODE_TID(CPL_PASS_ACCEPT_RPL, ep->hwtid)); | |
1301 | rpl->peer_ip = peer_ip; | |
1302 | rpl->opt0h = htonl(opt0h); | |
1303 | rpl->opt0l_status = htonl(opt0l | CPL_PASS_OPEN_ACCEPT); | |
1304 | rpl->opt2 = htonl(opt2); | |
1305 | rpl->rsvd = rpl->opt2; /* workaround for HW bug */ | |
1306 | skb->priority = CPL_PRIORITY_SETUP; | |
04b5d028 | 1307 | iwch_l2t_send(ep->com.tdev, skb, ep->l2t); |
b038ced7 SW |
1308 | |
1309 | return; | |
1310 | } | |
1311 | ||
1312 | static void reject_cr(struct t3cdev *tdev, u32 hwtid, __be32 peer_ip, | |
1313 | struct sk_buff *skb) | |
1314 | { | |
33718363 | 1315 | PDBG("%s t3cdev %p tid %u peer_ip %x\n", __func__, tdev, hwtid, |
b038ced7 SW |
1316 | peer_ip); |
1317 | BUG_ON(skb_cloned(skb)); | |
1318 | skb_trim(skb, sizeof(struct cpl_tid_release)); | |
1319 | skb_get(skb); | |
1320 | ||
8176d297 | 1321 | if (tdev->type != T3A) |
b038ced7 SW |
1322 | release_tid(tdev, hwtid, skb); |
1323 | else { | |
1324 | struct cpl_pass_accept_rpl *rpl; | |
1325 | ||
1326 | rpl = cplhdr(skb); | |
1327 | skb->priority = CPL_PRIORITY_SETUP; | |
1328 | rpl->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_FORWARD)); | |
1329 | OPCODE_TID(rpl) = htonl(MK_OPCODE_TID(CPL_PASS_ACCEPT_RPL, | |
1330 | hwtid)); | |
1331 | rpl->peer_ip = peer_ip; | |
1332 | rpl->opt0h = htonl(F_TCAM_BYPASS); | |
1333 | rpl->opt0l_status = htonl(CPL_PASS_OPEN_REJECT); | |
1334 | rpl->opt2 = 0; | |
1335 | rpl->rsvd = rpl->opt2; | |
04b5d028 | 1336 | iwch_cxgb3_ofld_send(tdev, skb); |
b038ced7 SW |
1337 | } |
1338 | } | |
1339 | ||
1340 | static int pass_accept_req(struct t3cdev *tdev, struct sk_buff *skb, void *ctx) | |
1341 | { | |
1342 | struct iwch_ep *child_ep, *parent_ep = ctx; | |
1343 | struct cpl_pass_accept_req *req = cplhdr(skb); | |
1344 | unsigned int hwtid = GET_TID(req); | |
1345 | struct dst_entry *dst; | |
1346 | struct l2t_entry *l2t; | |
1347 | struct rtable *rt; | |
1348 | struct iff_mac tim; | |
1349 | ||
33718363 | 1350 | PDBG("%s parent ep %p tid %u\n", __func__, parent_ep, hwtid); |
b038ced7 SW |
1351 | |
1352 | if (state_read(&parent_ep->com) != LISTEN) { | |
1353 | printk(KERN_ERR "%s - listening ep not in LISTEN\n", | |
33718363 | 1354 | __func__); |
b038ced7 SW |
1355 | goto reject; |
1356 | } | |
1357 | ||
1358 | /* | |
1359 | * Find the netdev for this connection request. | |
1360 | */ | |
1361 | tim.mac_addr = req->dst_mac; | |
1362 | tim.vlan_tag = ntohs(req->vlan_tag); | |
1363 | if (tdev->ctl(tdev, GET_IFF_FROM_MAC, &tim) < 0 || !tim.dev) { | |
eacc4d6a HS |
1364 | printk(KERN_ERR "%s bad dst mac %pM\n", |
1365 | __func__, req->dst_mac); | |
b038ced7 SW |
1366 | goto reject; |
1367 | } | |
1368 | ||
1369 | /* Find output route */ | |
1370 | rt = find_route(tdev, | |
1371 | req->local_ip, | |
1372 | req->peer_ip, | |
1373 | req->local_port, | |
1374 | req->peer_port, G_PASS_OPEN_TOS(ntohl(req->tos_tid))); | |
1375 | if (!rt) { | |
1376 | printk(KERN_ERR MOD "%s - failed to find dst entry!\n", | |
33718363 | 1377 | __func__); |
b038ced7 SW |
1378 | goto reject; |
1379 | } | |
d8d1f30b | 1380 | dst = &rt->dst; |
534cb283 | 1381 | l2t = t3_l2t_get(tdev, dst, NULL, &req->peer_ip); |
b038ced7 SW |
1382 | if (!l2t) { |
1383 | printk(KERN_ERR MOD "%s - failed to allocate l2t entry!\n", | |
33718363 | 1384 | __func__); |
b038ced7 SW |
1385 | dst_release(dst); |
1386 | goto reject; | |
1387 | } | |
1388 | child_ep = alloc_ep(sizeof(*child_ep), GFP_KERNEL); | |
1389 | if (!child_ep) { | |
1390 | printk(KERN_ERR MOD "%s - failed to allocate ep entry!\n", | |
33718363 | 1391 | __func__); |
e48f129c | 1392 | l2t_release(tdev, l2t); |
b038ced7 SW |
1393 | dst_release(dst); |
1394 | goto reject; | |
1395 | } | |
1396 | state_set(&child_ep->com, CONNECTING); | |
1397 | child_ep->com.tdev = tdev; | |
1398 | child_ep->com.cm_id = NULL; | |
1399 | child_ep->com.local_addr.sin_family = PF_INET; | |
1400 | child_ep->com.local_addr.sin_port = req->local_port; | |
1401 | child_ep->com.local_addr.sin_addr.s_addr = req->local_ip; | |
1402 | child_ep->com.remote_addr.sin_family = PF_INET; | |
1403 | child_ep->com.remote_addr.sin_port = req->peer_port; | |
1404 | child_ep->com.remote_addr.sin_addr.s_addr = req->peer_ip; | |
1405 | get_ep(&parent_ep->com); | |
1406 | child_ep->parent_ep = parent_ep; | |
1407 | child_ep->tos = G_PASS_OPEN_TOS(ntohl(req->tos_tid)); | |
1408 | child_ep->l2t = l2t; | |
1409 | child_ep->dst = dst; | |
1410 | child_ep->hwtid = hwtid; | |
1411 | init_timer(&child_ep->timer); | |
1412 | cxgb3_insert_tid(tdev, &t3c_client, child_ep, hwtid); | |
1413 | accept_cr(child_ep, req->peer_ip, skb); | |
1414 | goto out; | |
1415 | reject: | |
1416 | reject_cr(tdev, hwtid, req->peer_ip, skb); | |
1417 | out: | |
1418 | return CPL_RET_BUF_DONE; | |
1419 | } | |
1420 | ||
1421 | static int pass_establish(struct t3cdev *tdev, struct sk_buff *skb, void *ctx) | |
1422 | { | |
1423 | struct iwch_ep *ep = ctx; | |
1424 | struct cpl_pass_establish *req = cplhdr(skb); | |
1425 | ||
33718363 | 1426 | PDBG("%s ep %p\n", __func__, ep); |
b038ced7 | 1427 | ep->snd_seq = ntohl(req->snd_isn); |
de3d3530 | 1428 | ep->rcv_seq = ntohl(req->rcv_isn); |
b038ced7 SW |
1429 | |
1430 | set_emss(ep, ntohs(req->tcp_opt)); | |
1431 | ||
1432 | dst_confirm(ep->dst); | |
1433 | state_set(&ep->com, MPA_REQ_WAIT); | |
1434 | start_ep_timer(ep); | |
1435 | ||
1436 | return CPL_RET_BUF_DONE; | |
1437 | } | |
1438 | ||
1439 | static int peer_close(struct t3cdev *tdev, struct sk_buff *skb, void *ctx) | |
1440 | { | |
1441 | struct iwch_ep *ep = ctx; | |
1442 | struct iwch_qp_attributes attrs; | |
1443 | unsigned long flags; | |
1444 | int disconnect = 1; | |
1445 | int release = 0; | |
1446 | ||
33718363 | 1447 | PDBG("%s ep %p\n", __func__, ep); |
b038ced7 SW |
1448 | dst_confirm(ep->dst); |
1449 | ||
1450 | spin_lock_irqsave(&ep->com.lock, flags); | |
1451 | switch (ep->com.state) { | |
1452 | case MPA_REQ_WAIT: | |
1453 | __state_set(&ep->com, CLOSING); | |
1454 | break; | |
1455 | case MPA_REQ_SENT: | |
1456 | __state_set(&ep->com, CLOSING); | |
1457 | connect_reply_upcall(ep, -ECONNRESET); | |
1458 | break; | |
1459 | case MPA_REQ_RCVD: | |
1460 | ||
1461 | /* | |
1462 | * We're gonna mark this puppy DEAD, but keep | |
1463 | * the reference on it until the ULP accepts or | |
a52bf98d SW |
1464 | * rejects the CR. Also wake up anyone waiting |
1465 | * in rdma connection migration (see iwch_accept_cr()). | |
b038ced7 SW |
1466 | */ |
1467 | __state_set(&ep->com, CLOSING); | |
a52bf98d SW |
1468 | ep->com.rpl_done = 1; |
1469 | ep->com.rpl_err = -ECONNRESET; | |
1470 | PDBG("waking up ep %p\n", ep); | |
1471 | wake_up(&ep->com.waitq); | |
b038ced7 SW |
1472 | break; |
1473 | case MPA_REP_SENT: | |
1474 | __state_set(&ep->com, CLOSING); | |
1475 | ep->com.rpl_done = 1; | |
1476 | ep->com.rpl_err = -ECONNRESET; | |
1477 | PDBG("waking up ep %p\n", ep); | |
1478 | wake_up(&ep->com.waitq); | |
1479 | break; | |
1480 | case FPDU_MODE: | |
42e31753 | 1481 | start_ep_timer(ep); |
b038ced7 SW |
1482 | __state_set(&ep->com, CLOSING); |
1483 | attrs.next_state = IWCH_QP_STATE_CLOSING; | |
1484 | iwch_modify_qp(ep->com.qp->rhp, ep->com.qp, | |
1485 | IWCH_QP_ATTR_NEXT_STATE, &attrs, 1); | |
1486 | peer_close_upcall(ep); | |
1487 | break; | |
1488 | case ABORTING: | |
1489 | disconnect = 0; | |
1490 | break; | |
1491 | case CLOSING: | |
b038ced7 SW |
1492 | __state_set(&ep->com, MORIBUND); |
1493 | disconnect = 0; | |
1494 | break; | |
1495 | case MORIBUND: | |
1496 | stop_ep_timer(ep); | |
1497 | if (ep->com.cm_id && ep->com.qp) { | |
1498 | attrs.next_state = IWCH_QP_STATE_IDLE; | |
1499 | iwch_modify_qp(ep->com.qp->rhp, ep->com.qp, | |
1500 | IWCH_QP_ATTR_NEXT_STATE, &attrs, 1); | |
1501 | } | |
1502 | close_complete_upcall(ep); | |
1503 | __state_set(&ep->com, DEAD); | |
1504 | release = 1; | |
1505 | disconnect = 0; | |
1506 | break; | |
1507 | case DEAD: | |
1508 | disconnect = 0; | |
1509 | break; | |
1510 | default: | |
1511 | BUG_ON(1); | |
1512 | } | |
1513 | spin_unlock_irqrestore(&ep->com.lock, flags); | |
1514 | if (disconnect) | |
1515 | iwch_ep_disconnect(ep, 0, GFP_KERNEL); | |
1516 | if (release) | |
1517 | release_ep_resources(ep); | |
1518 | return CPL_RET_BUF_DONE; | |
1519 | } | |
1520 | ||
1521 | /* | |
1522 | * Returns whether an ABORT_REQ_RSS message is a negative advice. | |
1523 | */ | |
2b540355 | 1524 | static int is_neg_adv_abort(unsigned int status) |
b038ced7 SW |
1525 | { |
1526 | return status == CPL_ERR_RTX_NEG_ADVICE || | |
1527 | status == CPL_ERR_PERSIST_NEG_ADVICE; | |
1528 | } | |
1529 | ||
1530 | static int peer_abort(struct t3cdev *tdev, struct sk_buff *skb, void *ctx) | |
1531 | { | |
1532 | struct cpl_abort_req_rss *req = cplhdr(skb); | |
1533 | struct iwch_ep *ep = ctx; | |
1534 | struct cpl_abort_rpl *rpl; | |
1535 | struct sk_buff *rpl_skb; | |
1536 | struct iwch_qp_attributes attrs; | |
1537 | int ret; | |
989a1780 SW |
1538 | int release = 0; |
1539 | unsigned long flags; | |
b038ced7 | 1540 | |
1580367e | 1541 | if (is_neg_adv_abort(req->status)) { |
33718363 | 1542 | PDBG("%s neg_adv_abort ep %p tid %d\n", __func__, ep, |
1580367e SW |
1543 | ep->hwtid); |
1544 | t3_l2t_send_event(ep->com.tdev, ep->l2t); | |
1545 | return CPL_RET_BUF_DONE; | |
1546 | } | |
1547 | ||
aff9e39d SW |
1548 | /* |
1549 | * We get 2 peer aborts from the HW. The first one must | |
1550 | * be ignored except for scribbling that we need one more. | |
1551 | */ | |
6e47fe43 | 1552 | if (!test_and_set_bit(PEER_ABORT_IN_PROGRESS, &ep->com.flags)) { |
aff9e39d SW |
1553 | return CPL_RET_BUF_DONE; |
1554 | } | |
1555 | ||
989a1780 SW |
1556 | spin_lock_irqsave(&ep->com.lock, flags); |
1557 | PDBG("%s ep %p state %u\n", __func__, ep, ep->com.state); | |
1558 | switch (ep->com.state) { | |
b038ced7 SW |
1559 | case CONNECTING: |
1560 | break; | |
1561 | case MPA_REQ_WAIT: | |
adf376b3 | 1562 | stop_ep_timer(ep); |
b038ced7 SW |
1563 | break; |
1564 | case MPA_REQ_SENT: | |
adf376b3 | 1565 | stop_ep_timer(ep); |
b038ced7 SW |
1566 | connect_reply_upcall(ep, -ECONNRESET); |
1567 | break; | |
1568 | case MPA_REP_SENT: | |
1569 | ep->com.rpl_done = 1; | |
1570 | ep->com.rpl_err = -ECONNRESET; | |
1571 | PDBG("waking up ep %p\n", ep); | |
1572 | wake_up(&ep->com.waitq); | |
1573 | break; | |
1574 | case MPA_REQ_RCVD: | |
1575 | ||
1576 | /* | |
1577 | * We're gonna mark this puppy DEAD, but keep | |
1578 | * the reference on it until the ULP accepts or | |
a52bf98d SW |
1579 | * rejects the CR. Also wake up anyone waiting |
1580 | * in rdma connection migration (see iwch_accept_cr()). | |
b038ced7 | 1581 | */ |
a52bf98d SW |
1582 | ep->com.rpl_done = 1; |
1583 | ep->com.rpl_err = -ECONNRESET; | |
1584 | PDBG("waking up ep %p\n", ep); | |
1585 | wake_up(&ep->com.waitq); | |
b038ced7 SW |
1586 | break; |
1587 | case MORIBUND: | |
42e31753 | 1588 | case CLOSING: |
b038ced7 | 1589 | stop_ep_timer(ep); |
42e31753 | 1590 | /*FALLTHROUGH*/ |
b038ced7 | 1591 | case FPDU_MODE: |
b038ced7 SW |
1592 | if (ep->com.cm_id && ep->com.qp) { |
1593 | attrs.next_state = IWCH_QP_STATE_ERROR; | |
1594 | ret = iwch_modify_qp(ep->com.qp->rhp, | |
1595 | ep->com.qp, IWCH_QP_ATTR_NEXT_STATE, | |
1596 | &attrs, 1); | |
1597 | if (ret) | |
1598 | printk(KERN_ERR MOD | |
1599 | "%s - qp <- error failed!\n", | |
33718363 | 1600 | __func__); |
b038ced7 SW |
1601 | } |
1602 | peer_abort_upcall(ep); | |
1603 | break; | |
1604 | case ABORTING: | |
1605 | break; | |
1606 | case DEAD: | |
33718363 | 1607 | PDBG("%s PEER_ABORT IN DEAD STATE!!!!\n", __func__); |
989a1780 | 1608 | spin_unlock_irqrestore(&ep->com.lock, flags); |
b038ced7 SW |
1609 | return CPL_RET_BUF_DONE; |
1610 | default: | |
1611 | BUG_ON(1); | |
1612 | break; | |
1613 | } | |
1614 | dst_confirm(ep->dst); | |
989a1780 SW |
1615 | if (ep->com.state != ABORTING) { |
1616 | __state_set(&ep->com, DEAD); | |
1617 | release = 1; | |
1618 | } | |
1619 | spin_unlock_irqrestore(&ep->com.lock, flags); | |
b038ced7 SW |
1620 | |
1621 | rpl_skb = get_skb(skb, sizeof(*rpl), GFP_KERNEL); | |
1622 | if (!rpl_skb) { | |
1623 | printk(KERN_ERR MOD "%s - cannot allocate skb!\n", | |
33718363 | 1624 | __func__); |
989a1780 SW |
1625 | release = 1; |
1626 | goto out; | |
b038ced7 SW |
1627 | } |
1628 | rpl_skb->priority = CPL_PRIORITY_DATA; | |
1629 | rpl = (struct cpl_abort_rpl *) skb_put(rpl_skb, sizeof(*rpl)); | |
1630 | rpl->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_OFLD_HOST_ABORT_CON_RPL)); | |
1631 | rpl->wr.wr_lo = htonl(V_WR_TID(ep->hwtid)); | |
1632 | OPCODE_TID(rpl) = htonl(MK_OPCODE_TID(CPL_ABORT_RPL, ep->hwtid)); | |
1633 | rpl->cmd = CPL_ABORT_NO_RST; | |
04b5d028 | 1634 | iwch_cxgb3_ofld_send(ep->com.tdev, rpl_skb); |
989a1780 SW |
1635 | out: |
1636 | if (release) | |
b038ced7 | 1637 | release_ep_resources(ep); |
b038ced7 SW |
1638 | return CPL_RET_BUF_DONE; |
1639 | } | |
1640 | ||
1641 | static int close_con_rpl(struct t3cdev *tdev, struct sk_buff *skb, void *ctx) | |
1642 | { | |
1643 | struct iwch_ep *ep = ctx; | |
1644 | struct iwch_qp_attributes attrs; | |
1645 | unsigned long flags; | |
1646 | int release = 0; | |
1647 | ||
33718363 | 1648 | PDBG("%s ep %p\n", __func__, ep); |
b038ced7 SW |
1649 | BUG_ON(!ep); |
1650 | ||
1651 | /* The cm_id may be null if we failed to connect */ | |
1652 | spin_lock_irqsave(&ep->com.lock, flags); | |
1653 | switch (ep->com.state) { | |
1654 | case CLOSING: | |
b038ced7 SW |
1655 | __state_set(&ep->com, MORIBUND); |
1656 | break; | |
1657 | case MORIBUND: | |
1658 | stop_ep_timer(ep); | |
1659 | if ((ep->com.cm_id) && (ep->com.qp)) { | |
1660 | attrs.next_state = IWCH_QP_STATE_IDLE; | |
1661 | iwch_modify_qp(ep->com.qp->rhp, | |
1662 | ep->com.qp, | |
1663 | IWCH_QP_ATTR_NEXT_STATE, | |
1664 | &attrs, 1); | |
1665 | } | |
1666 | close_complete_upcall(ep); | |
1667 | __state_set(&ep->com, DEAD); | |
1668 | release = 1; | |
1669 | break; | |
42e31753 | 1670 | case ABORTING: |
b038ced7 | 1671 | case DEAD: |
c4d49776 | 1672 | break; |
b038ced7 SW |
1673 | default: |
1674 | BUG_ON(1); | |
1675 | break; | |
1676 | } | |
1677 | spin_unlock_irqrestore(&ep->com.lock, flags); | |
1678 | if (release) | |
1679 | release_ep_resources(ep); | |
1680 | return CPL_RET_BUF_DONE; | |
1681 | } | |
1682 | ||
1683 | /* | |
1684 | * T3A does 3 things when a TERM is received: | |
1685 | * 1) send up a CPL_RDMA_TERMINATE message with the TERM packet | |
1686 | * 2) generate an async event on the QP with the TERMINATE opcode | |
142ad5db | 1687 | * 3) post a TERMINATE opcode cqe into the associated CQ. |
b038ced7 SW |
1688 | * |
1689 | * For (1), we save the message in the qp for later consumer consumption. | |
1690 | * For (2), we move the QP into TERMINATE, post a QP event and disconnect. | |
1691 | * For (3), we toss the CQE in cxio_poll_cq(). | |
1692 | * | |
1693 | * terminate() handles case (1)... | |
1694 | */ | |
1695 | static int terminate(struct t3cdev *tdev, struct sk_buff *skb, void *ctx) | |
1696 | { | |
1697 | struct iwch_ep *ep = ctx; | |
1698 | ||
42fb61f0 SW |
1699 | if (state_read(&ep->com) != FPDU_MODE) |
1700 | return CPL_RET_BUF_DONE; | |
1701 | ||
33718363 | 1702 | PDBG("%s ep %p\n", __func__, ep); |
b038ced7 | 1703 | skb_pull(skb, sizeof(struct cpl_rdma_terminate)); |
33718363 | 1704 | PDBG("%s saving %d bytes of term msg\n", __func__, skb->len); |
d626f62b ACM |
1705 | skb_copy_from_linear_data(skb, ep->com.qp->attr.terminate_buffer, |
1706 | skb->len); | |
b038ced7 SW |
1707 | ep->com.qp->attr.terminate_msg_len = skb->len; |
1708 | ep->com.qp->attr.is_terminate_local = 0; | |
1709 | return CPL_RET_BUF_DONE; | |
1710 | } | |
1711 | ||
1712 | static int ec_status(struct t3cdev *tdev, struct sk_buff *skb, void *ctx) | |
1713 | { | |
1714 | struct cpl_rdma_ec_status *rep = cplhdr(skb); | |
1715 | struct iwch_ep *ep = ctx; | |
1716 | ||
33718363 | 1717 | PDBG("%s ep %p tid %u status %d\n", __func__, ep, ep->hwtid, |
b038ced7 SW |
1718 | rep->status); |
1719 | if (rep->status) { | |
1720 | struct iwch_qp_attributes attrs; | |
1721 | ||
1722 | printk(KERN_ERR MOD "%s BAD CLOSE - Aborting tid %u\n", | |
33718363 | 1723 | __func__, ep->hwtid); |
2f236735 | 1724 | stop_ep_timer(ep); |
b038ced7 SW |
1725 | attrs.next_state = IWCH_QP_STATE_ERROR; |
1726 | iwch_modify_qp(ep->com.qp->rhp, | |
1727 | ep->com.qp, IWCH_QP_ATTR_NEXT_STATE, | |
1728 | &attrs, 1); | |
1729 | abort_connection(ep, NULL, GFP_KERNEL); | |
1730 | } | |
1731 | return CPL_RET_BUF_DONE; | |
1732 | } | |
1733 | ||
1734 | static void ep_timeout(unsigned long arg) | |
1735 | { | |
1736 | struct iwch_ep *ep = (struct iwch_ep *)arg; | |
1737 | struct iwch_qp_attributes attrs; | |
1738 | unsigned long flags; | |
989a1780 | 1739 | int abort = 1; |
b038ced7 SW |
1740 | |
1741 | spin_lock_irqsave(&ep->com.lock, flags); | |
33718363 | 1742 | PDBG("%s ep %p tid %u state %d\n", __func__, ep, ep->hwtid, |
b038ced7 SW |
1743 | ep->com.state); |
1744 | switch (ep->com.state) { | |
1745 | case MPA_REQ_SENT: | |
989a1780 | 1746 | __state_set(&ep->com, ABORTING); |
b038ced7 SW |
1747 | connect_reply_upcall(ep, -ETIMEDOUT); |
1748 | break; | |
1749 | case MPA_REQ_WAIT: | |
989a1780 | 1750 | __state_set(&ep->com, ABORTING); |
b038ced7 | 1751 | break; |
42e31753 | 1752 | case CLOSING: |
b038ced7 SW |
1753 | case MORIBUND: |
1754 | if (ep->com.cm_id && ep->com.qp) { | |
1755 | attrs.next_state = IWCH_QP_STATE_ERROR; | |
1756 | iwch_modify_qp(ep->com.qp->rhp, | |
1757 | ep->com.qp, IWCH_QP_ATTR_NEXT_STATE, | |
1758 | &attrs, 1); | |
1759 | } | |
989a1780 | 1760 | __state_set(&ep->com, ABORTING); |
b038ced7 SW |
1761 | break; |
1762 | default: | |
5107c2a3 | 1763 | WARN(1, "%s unexpected state ep %p state %u\n", |
989a1780 | 1764 | __func__, ep, ep->com.state); |
989a1780 | 1765 | abort = 0; |
b038ced7 | 1766 | } |
b038ced7 | 1767 | spin_unlock_irqrestore(&ep->com.lock, flags); |
989a1780 SW |
1768 | if (abort) |
1769 | abort_connection(ep, NULL, GFP_ATOMIC); | |
b038ced7 SW |
1770 | put_ep(&ep->com); |
1771 | } | |
1772 | ||
1773 | int iwch_reject_cr(struct iw_cm_id *cm_id, const void *pdata, u8 pdata_len) | |
1774 | { | |
1775 | int err; | |
1776 | struct iwch_ep *ep = to_ep(cm_id); | |
33718363 | 1777 | PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid); |
b038ced7 SW |
1778 | |
1779 | if (state_read(&ep->com) == DEAD) { | |
1780 | put_ep(&ep->com); | |
1781 | return -ECONNRESET; | |
1782 | } | |
1783 | BUG_ON(state_read(&ep->com) != MPA_REQ_RCVD); | |
b038ced7 SW |
1784 | if (mpa_rev == 0) |
1785 | abort_connection(ep, NULL, GFP_KERNEL); | |
1786 | else { | |
1787 | err = send_mpa_reject(ep, pdata, pdata_len); | |
7d526e6b | 1788 | err = iwch_ep_disconnect(ep, 0, GFP_KERNEL); |
b038ced7 | 1789 | } |
6e47fe43 | 1790 | put_ep(&ep->com); |
b038ced7 SW |
1791 | return 0; |
1792 | } | |
1793 | ||
1794 | int iwch_accept_cr(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param) | |
1795 | { | |
1796 | int err; | |
1797 | struct iwch_qp_attributes attrs; | |
1798 | enum iwch_qp_attr_mask mask; | |
1799 | struct iwch_ep *ep = to_ep(cm_id); | |
1800 | struct iwch_dev *h = to_iwch_dev(cm_id->device); | |
1801 | struct iwch_qp *qp = get_qhp(h, conn_param->qpn); | |
1802 | ||
33718363 | 1803 | PDBG("%s ep %p tid %u\n", __func__, ep, ep->hwtid); |
6e47fe43 SW |
1804 | if (state_read(&ep->com) == DEAD) { |
1805 | err = -ECONNRESET; | |
1806 | goto err; | |
1807 | } | |
b038ced7 SW |
1808 | |
1809 | BUG_ON(state_read(&ep->com) != MPA_REQ_RCVD); | |
1810 | BUG_ON(!qp); | |
1811 | ||
1812 | if ((conn_param->ord > qp->rhp->attr.max_rdma_read_qp_depth) || | |
1813 | (conn_param->ird > qp->rhp->attr.max_rdma_reads_per_qp)) { | |
1814 | abort_connection(ep, NULL, GFP_KERNEL); | |
6e47fe43 SW |
1815 | err = -EINVAL; |
1816 | goto err; | |
b038ced7 SW |
1817 | } |
1818 | ||
1819 | cm_id->add_ref(cm_id); | |
1820 | ep->com.cm_id = cm_id; | |
1821 | ep->com.qp = qp; | |
1822 | ||
b038ced7 SW |
1823 | ep->ird = conn_param->ird; |
1824 | ep->ord = conn_param->ord; | |
96ac7e88 SW |
1825 | |
1826 | if (peer2peer && ep->ird == 0) | |
1827 | ep->ird = 1; | |
1828 | ||
33718363 | 1829 | PDBG("%s %d ird %d ord %d\n", __func__, __LINE__, ep->ird, ep->ord); |
de3d3530 | 1830 | |
b038ced7 SW |
1831 | /* bind QP to EP and move to RTS */ |
1832 | attrs.mpa_attr = ep->mpa_attr; | |
1f71f503 | 1833 | attrs.max_ird = ep->ird; |
b038ced7 SW |
1834 | attrs.max_ord = ep->ord; |
1835 | attrs.llp_stream_handle = ep; | |
1836 | attrs.next_state = IWCH_QP_STATE_RTS; | |
1837 | ||
1838 | /* bind QP and TID with INIT_WR */ | |
1839 | mask = IWCH_QP_ATTR_NEXT_STATE | | |
1840 | IWCH_QP_ATTR_LLP_STREAM_HANDLE | | |
1841 | IWCH_QP_ATTR_MPA_ATTR | | |
1842 | IWCH_QP_ATTR_MAX_IRD | | |
1843 | IWCH_QP_ATTR_MAX_ORD; | |
1844 | ||
1845 | err = iwch_modify_qp(ep->com.qp->rhp, | |
1846 | ep->com.qp, mask, &attrs, 1); | |
de3d3530 | 1847 | if (err) |
6e47fe43 | 1848 | goto err1; |
b038ced7 | 1849 | |
f8b0dfd1 SW |
1850 | /* if needed, wait for wr_ack */ |
1851 | if (iwch_rqes_posted(qp)) { | |
1852 | wait_event(ep->com.waitq, ep->com.rpl_done); | |
1853 | err = ep->com.rpl_err; | |
1854 | if (err) | |
6e47fe43 | 1855 | goto err1; |
f8b0dfd1 SW |
1856 | } |
1857 | ||
de3d3530 SW |
1858 | err = send_mpa_reply(ep, conn_param->private_data, |
1859 | conn_param->private_data_len); | |
1860 | if (err) | |
6e47fe43 | 1861 | goto err1; |
de3d3530 | 1862 | |
de3d3530 SW |
1863 | |
1864 | state_set(&ep->com, FPDU_MODE); | |
1865 | established_upcall(ep); | |
1866 | put_ep(&ep->com); | |
1867 | return 0; | |
6e47fe43 | 1868 | err1: |
de3d3530 SW |
1869 | ep->com.cm_id = NULL; |
1870 | ep->com.qp = NULL; | |
1871 | cm_id->rem_ref(cm_id); | |
6e47fe43 | 1872 | err: |
b038ced7 SW |
1873 | put_ep(&ep->com); |
1874 | return err; | |
1875 | } | |
1876 | ||
8704e9a8 SW |
1877 | static int is_loopback_dst(struct iw_cm_id *cm_id) |
1878 | { | |
1879 | struct net_device *dev; | |
c1340e8a | 1880 | struct sockaddr_in *raddr = (struct sockaddr_in *)&cm_id->m_remote_addr; |
8704e9a8 | 1881 | |
24d44a39 | 1882 | dev = ip_dev_find(&init_net, raddr->sin_addr.s_addr); |
8704e9a8 SW |
1883 | if (!dev) |
1884 | return 0; | |
1885 | dev_put(dev); | |
1886 | return 1; | |
1887 | } | |
1888 | ||
b038ced7 SW |
1889 | int iwch_connect(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param) |
1890 | { | |
b038ced7 SW |
1891 | struct iwch_dev *h = to_iwch_dev(cm_id->device); |
1892 | struct iwch_ep *ep; | |
1893 | struct rtable *rt; | |
69cce1d1 | 1894 | int err = 0; |
c1340e8a SW |
1895 | struct sockaddr_in *laddr = (struct sockaddr_in *)&cm_id->m_local_addr; |
1896 | struct sockaddr_in *raddr = (struct sockaddr_in *)&cm_id->m_remote_addr; | |
24d44a39 | 1897 | |
c1340e8a | 1898 | if (cm_id->m_remote_addr.ss_family != PF_INET) { |
24d44a39 SW |
1899 | err = -ENOSYS; |
1900 | goto out; | |
1901 | } | |
b038ced7 | 1902 | |
8704e9a8 SW |
1903 | if (is_loopback_dst(cm_id)) { |
1904 | err = -ENOSYS; | |
1905 | goto out; | |
1906 | } | |
1907 | ||
b038ced7 SW |
1908 | ep = alloc_ep(sizeof(*ep), GFP_KERNEL); |
1909 | if (!ep) { | |
33718363 | 1910 | printk(KERN_ERR MOD "%s - cannot alloc ep.\n", __func__); |
b038ced7 SW |
1911 | err = -ENOMEM; |
1912 | goto out; | |
1913 | } | |
1914 | init_timer(&ep->timer); | |
1915 | ep->plen = conn_param->private_data_len; | |
1916 | if (ep->plen) | |
1917 | memcpy(ep->mpa_pkt + sizeof(struct mpa_message), | |
1918 | conn_param->private_data, ep->plen); | |
1919 | ep->ird = conn_param->ird; | |
1920 | ep->ord = conn_param->ord; | |
96ac7e88 SW |
1921 | |
1922 | if (peer2peer && ep->ord == 0) | |
1923 | ep->ord = 1; | |
1924 | ||
b038ced7 SW |
1925 | ep->com.tdev = h->rdev.t3cdev_p; |
1926 | ||
1927 | cm_id->add_ref(cm_id); | |
1928 | ep->com.cm_id = cm_id; | |
1929 | ep->com.qp = get_qhp(h, conn_param->qpn); | |
1930 | BUG_ON(!ep->com.qp); | |
33718363 | 1931 | PDBG("%s qpn 0x%x qp %p cm_id %p\n", __func__, conn_param->qpn, |
b038ced7 SW |
1932 | ep->com.qp, cm_id); |
1933 | ||
1934 | /* | |
1935 | * Allocate an active TID to initiate a TCP connection. | |
1936 | */ | |
1937 | ep->atid = cxgb3_alloc_atid(h->rdev.t3cdev_p, &t3c_client, ep); | |
1938 | if (ep->atid == -1) { | |
33718363 | 1939 | printk(KERN_ERR MOD "%s - cannot alloc atid.\n", __func__); |
b038ced7 SW |
1940 | err = -ENOMEM; |
1941 | goto fail2; | |
1942 | } | |
1943 | ||
1944 | /* find a route */ | |
24d44a39 SW |
1945 | rt = find_route(h->rdev.t3cdev_p, laddr->sin_addr.s_addr, |
1946 | raddr->sin_addr.s_addr, laddr->sin_port, | |
1947 | raddr->sin_port, IPTOS_LOWDELAY); | |
b038ced7 | 1948 | if (!rt) { |
33718363 | 1949 | printk(KERN_ERR MOD "%s - cannot find route.\n", __func__); |
b038ced7 SW |
1950 | err = -EHOSTUNREACH; |
1951 | goto fail3; | |
1952 | } | |
d8d1f30b | 1953 | ep->dst = &rt->dst; |
534cb283 | 1954 | ep->l2t = t3_l2t_get(ep->com.tdev, ep->dst, NULL, |
24d44a39 | 1955 | &raddr->sin_addr.s_addr); |
b038ced7 | 1956 | if (!ep->l2t) { |
33718363 | 1957 | printk(KERN_ERR MOD "%s - cannot alloc l2e.\n", __func__); |
b038ced7 SW |
1958 | err = -ENOMEM; |
1959 | goto fail4; | |
1960 | } | |
1961 | ||
1962 | state_set(&ep->com, CONNECTING); | |
1963 | ep->tos = IPTOS_LOWDELAY; | |
c1340e8a | 1964 | memcpy(&ep->com.local_addr, &cm_id->m_local_addr, |
24d44a39 | 1965 | sizeof(ep->com.local_addr)); |
c1340e8a | 1966 | memcpy(&ep->com.remote_addr, &cm_id->m_remote_addr, |
24d44a39 | 1967 | sizeof(ep->com.remote_addr)); |
b038ced7 SW |
1968 | |
1969 | /* send connect request to rnic */ | |
1970 | err = send_connect(ep); | |
1971 | if (!err) | |
1972 | goto out; | |
1973 | ||
e48f129c | 1974 | l2t_release(h->rdev.t3cdev_p, ep->l2t); |
b038ced7 SW |
1975 | fail4: |
1976 | dst_release(ep->dst); | |
1977 | fail3: | |
1978 | cxgb3_free_atid(ep->com.tdev, ep->atid); | |
1979 | fail2: | |
dc35fac9 | 1980 | cm_id->rem_ref(cm_id); |
b038ced7 SW |
1981 | put_ep(&ep->com); |
1982 | out: | |
1983 | return err; | |
1984 | } | |
1985 | ||
1986 | int iwch_create_listen(struct iw_cm_id *cm_id, int backlog) | |
1987 | { | |
1988 | int err = 0; | |
1989 | struct iwch_dev *h = to_iwch_dev(cm_id->device); | |
1990 | struct iwch_listen_ep *ep; | |
1991 | ||
1992 | ||
1993 | might_sleep(); | |
1994 | ||
c1340e8a | 1995 | if (cm_id->m_local_addr.ss_family != PF_INET) { |
24d44a39 SW |
1996 | err = -ENOSYS; |
1997 | goto fail1; | |
1998 | } | |
1999 | ||
b038ced7 SW |
2000 | ep = alloc_ep(sizeof(*ep), GFP_KERNEL); |
2001 | if (!ep) { | |
33718363 | 2002 | printk(KERN_ERR MOD "%s - cannot alloc ep.\n", __func__); |
b038ced7 SW |
2003 | err = -ENOMEM; |
2004 | goto fail1; | |
2005 | } | |
33718363 | 2006 | PDBG("%s ep %p\n", __func__, ep); |
b038ced7 SW |
2007 | ep->com.tdev = h->rdev.t3cdev_p; |
2008 | cm_id->add_ref(cm_id); | |
2009 | ep->com.cm_id = cm_id; | |
2010 | ep->backlog = backlog; | |
c1340e8a | 2011 | memcpy(&ep->com.local_addr, &cm_id->m_local_addr, |
24d44a39 | 2012 | sizeof(ep->com.local_addr)); |
b038ced7 SW |
2013 | |
2014 | /* | |
2015 | * Allocate a server TID. | |
2016 | */ | |
2017 | ep->stid = cxgb3_alloc_stid(h->rdev.t3cdev_p, &t3c_client, ep); | |
2018 | if (ep->stid == -1) { | |
33718363 | 2019 | printk(KERN_ERR MOD "%s - cannot alloc atid.\n", __func__); |
b038ced7 SW |
2020 | err = -ENOMEM; |
2021 | goto fail2; | |
2022 | } | |
2023 | ||
2024 | state_set(&ep->com, LISTEN); | |
2025 | err = listen_start(ep); | |
2026 | if (err) | |
2027 | goto fail3; | |
2028 | ||
2029 | /* wait for pass_open_rpl */ | |
2030 | wait_event(ep->com.waitq, ep->com.rpl_done); | |
2031 | err = ep->com.rpl_err; | |
2032 | if (!err) { | |
2033 | cm_id->provider_data = ep; | |
2034 | goto out; | |
2035 | } | |
2036 | fail3: | |
2037 | cxgb3_free_stid(ep->com.tdev, ep->stid); | |
2038 | fail2: | |
1b07db70 | 2039 | cm_id->rem_ref(cm_id); |
b038ced7 SW |
2040 | put_ep(&ep->com); |
2041 | fail1: | |
2042 | out: | |
2043 | return err; | |
2044 | } | |
2045 | ||
2046 | int iwch_destroy_listen(struct iw_cm_id *cm_id) | |
2047 | { | |
2048 | int err; | |
2049 | struct iwch_listen_ep *ep = to_listen_ep(cm_id); | |
2050 | ||
33718363 | 2051 | PDBG("%s ep %p\n", __func__, ep); |
b038ced7 SW |
2052 | |
2053 | might_sleep(); | |
2054 | state_set(&ep->com, DEAD); | |
2055 | ep->com.rpl_done = 0; | |
2056 | ep->com.rpl_err = 0; | |
2057 | err = listen_stop(ep); | |
04b5d028 SW |
2058 | if (err) |
2059 | goto done; | |
b038ced7 SW |
2060 | wait_event(ep->com.waitq, ep->com.rpl_done); |
2061 | cxgb3_free_stid(ep->com.tdev, ep->stid); | |
04b5d028 | 2062 | done: |
b038ced7 SW |
2063 | err = ep->com.rpl_err; |
2064 | cm_id->rem_ref(cm_id); | |
2065 | put_ep(&ep->com); | |
2066 | return err; | |
2067 | } | |
2068 | ||
2069 | int iwch_ep_disconnect(struct iwch_ep *ep, int abrupt, gfp_t gfp) | |
2070 | { | |
2071 | int ret=0; | |
2072 | unsigned long flags; | |
2073 | int close = 0; | |
04b5d028 SW |
2074 | int fatal = 0; |
2075 | struct t3cdev *tdev; | |
2076 | struct cxio_rdev *rdev; | |
b038ced7 SW |
2077 | |
2078 | spin_lock_irqsave(&ep->com.lock, flags); | |
2079 | ||
33718363 | 2080 | PDBG("%s ep %p state %s, abrupt %d\n", __func__, ep, |
b038ced7 SW |
2081 | states[ep->com.state], abrupt); |
2082 | ||
04b5d028 SW |
2083 | tdev = (struct t3cdev *)ep->com.tdev; |
2084 | rdev = (struct cxio_rdev *)tdev->ulp; | |
2085 | if (cxio_fatal_error(rdev)) { | |
2086 | fatal = 1; | |
2087 | close_complete_upcall(ep); | |
2088 | ep->com.state = DEAD; | |
2089 | } | |
b038ced7 SW |
2090 | switch (ep->com.state) { |
2091 | case MPA_REQ_WAIT: | |
2092 | case MPA_REQ_SENT: | |
2093 | case MPA_REQ_RCVD: | |
2094 | case MPA_REP_SENT: | |
2095 | case FPDU_MODE: | |
b038ced7 | 2096 | close = 1; |
989a1780 SW |
2097 | if (abrupt) |
2098 | ep->com.state = ABORTING; | |
2099 | else { | |
2100 | ep->com.state = CLOSING; | |
2101 | start_ep_timer(ep); | |
2102 | } | |
6e47fe43 | 2103 | set_bit(CLOSE_SENT, &ep->com.flags); |
b038ced7 SW |
2104 | break; |
2105 | case CLOSING: | |
6e47fe43 SW |
2106 | if (!test_and_set_bit(CLOSE_SENT, &ep->com.flags)) { |
2107 | close = 1; | |
2108 | if (abrupt) { | |
2109 | stop_ep_timer(ep); | |
2110 | ep->com.state = ABORTING; | |
2111 | } else | |
2112 | ep->com.state = MORIBUND; | |
2113 | } | |
b038ced7 SW |
2114 | break; |
2115 | case MORIBUND: | |
989a1780 SW |
2116 | case ABORTING: |
2117 | case DEAD: | |
2118 | PDBG("%s ignoring disconnect ep %p state %u\n", | |
2119 | __func__, ep, ep->com.state); | |
b038ced7 SW |
2120 | break; |
2121 | default: | |
2122 | BUG(); | |
2123 | break; | |
2124 | } | |
989a1780 | 2125 | |
b038ced7 SW |
2126 | spin_unlock_irqrestore(&ep->com.lock, flags); |
2127 | if (close) { | |
2128 | if (abrupt) | |
2129 | ret = send_abort(ep, NULL, gfp); | |
2130 | else | |
2131 | ret = send_halfclose(ep, gfp); | |
04b5d028 SW |
2132 | if (ret) |
2133 | fatal = 1; | |
b038ced7 | 2134 | } |
04b5d028 SW |
2135 | if (fatal) |
2136 | release_ep_resources(ep); | |
b038ced7 SW |
2137 | return ret; |
2138 | } | |
2139 | ||
2140 | int iwch_ep_redirect(void *ctx, struct dst_entry *old, struct dst_entry *new, | |
2141 | struct l2t_entry *l2t) | |
2142 | { | |
2143 | struct iwch_ep *ep = ctx; | |
2144 | ||
2145 | if (ep->dst != old) | |
2146 | return 0; | |
2147 | ||
33718363 | 2148 | PDBG("%s ep %p redirect to dst %p l2t %p\n", __func__, ep, new, |
b038ced7 SW |
2149 | l2t); |
2150 | dst_hold(new); | |
e48f129c | 2151 | l2t_release(ep->com.tdev, ep->l2t); |
b038ced7 SW |
2152 | ep->l2t = l2t; |
2153 | dst_release(old); | |
2154 | ep->dst = new; | |
2155 | return 1; | |
2156 | } | |
2157 | ||
2158 | /* | |
2159 | * All the CM events are handled on a work queue to have a safe context. | |
617c9a7e | 2160 | * These are the real handlers that are called from the work queue. |
b038ced7 | 2161 | */ |
617c9a7e RD |
2162 | static const cxgb3_cpl_handler_func work_handlers[NUM_CPL_CMDS] = { |
2163 | [CPL_ACT_ESTABLISH] = act_establish, | |
2164 | [CPL_ACT_OPEN_RPL] = act_open_rpl, | |
2165 | [CPL_RX_DATA] = rx_data, | |
2166 | [CPL_TX_DMA_ACK] = tx_ack, | |
2167 | [CPL_ABORT_RPL_RSS] = abort_rpl, | |
2168 | [CPL_ABORT_RPL] = abort_rpl, | |
2169 | [CPL_PASS_OPEN_RPL] = pass_open_rpl, | |
2170 | [CPL_CLOSE_LISTSRV_RPL] = close_listsrv_rpl, | |
2171 | [CPL_PASS_ACCEPT_REQ] = pass_accept_req, | |
2172 | [CPL_PASS_ESTABLISH] = pass_establish, | |
2173 | [CPL_PEER_CLOSE] = peer_close, | |
2174 | [CPL_ABORT_REQ_RSS] = peer_abort, | |
2175 | [CPL_CLOSE_CON_RPL] = close_con_rpl, | |
2176 | [CPL_RDMA_TERMINATE] = terminate, | |
2177 | [CPL_RDMA_EC_STATUS] = ec_status, | |
2178 | }; | |
2179 | ||
2180 | static void process_work(struct work_struct *work) | |
2181 | { | |
2182 | struct sk_buff *skb = NULL; | |
2183 | void *ep; | |
2184 | struct t3cdev *tdev; | |
2185 | int ret; | |
2186 | ||
2187 | while ((skb = skb_dequeue(&rxq))) { | |
2188 | ep = *((void **) (skb->cb)); | |
2189 | tdev = *((struct t3cdev **) (skb->cb + sizeof(void *))); | |
2190 | ret = work_handlers[G_OPCODE(ntohl((__force __be32)skb->csum))](tdev, skb, ep); | |
2191 | if (ret & CPL_RET_BUF_DONE) | |
2192 | kfree_skb(skb); | |
2193 | ||
2194 | /* | |
2195 | * ep was referenced in sched(), and is freed here. | |
2196 | */ | |
2197 | put_ep((struct iwch_ep_common *)ep); | |
2198 | } | |
2199 | } | |
2200 | ||
2201 | static DECLARE_WORK(skb_work, process_work); | |
2202 | ||
b038ced7 SW |
2203 | static int sched(struct t3cdev *tdev, struct sk_buff *skb, void *ctx) |
2204 | { | |
2205 | struct iwch_ep_common *epc = ctx; | |
2206 | ||
2207 | get_ep(epc); | |
2208 | ||
2209 | /* | |
2210 | * Save ctx and tdev in the skb->cb area. | |
2211 | */ | |
2212 | *((void **) skb->cb) = ctx; | |
2213 | *((struct t3cdev **) (skb->cb + sizeof(void *))) = tdev; | |
2214 | ||
2215 | /* | |
2216 | * Queue the skb and schedule the worker thread. | |
2217 | */ | |
2218 | skb_queue_tail(&rxq, skb); | |
2219 | queue_work(workq, &skb_work); | |
2220 | return 0; | |
2221 | } | |
2222 | ||
1ca19770 SW |
2223 | static int set_tcb_rpl(struct t3cdev *tdev, struct sk_buff *skb, void *ctx) |
2224 | { | |
2225 | struct cpl_set_tcb_rpl *rpl = cplhdr(skb); | |
2226 | ||
2227 | if (rpl->status != CPL_ERR_NONE) { | |
2228 | printk(KERN_ERR MOD "Unexpected SET_TCB_RPL status %u " | |
2229 | "for tid %u\n", rpl->status, GET_TID(rpl)); | |
2230 | } | |
2231 | return CPL_RET_BUF_DONE; | |
2232 | } | |
2233 | ||
617c9a7e RD |
2234 | /* |
2235 | * All upcalls from the T3 Core go to sched() to schedule the | |
2236 | * processing on a work queue. | |
2237 | */ | |
2238 | cxgb3_cpl_handler_func t3c_handlers[NUM_CPL_CMDS] = { | |
2239 | [CPL_ACT_ESTABLISH] = sched, | |
2240 | [CPL_ACT_OPEN_RPL] = sched, | |
2241 | [CPL_RX_DATA] = sched, | |
2242 | [CPL_TX_DMA_ACK] = sched, | |
2243 | [CPL_ABORT_RPL_RSS] = sched, | |
2244 | [CPL_ABORT_RPL] = sched, | |
2245 | [CPL_PASS_OPEN_RPL] = sched, | |
2246 | [CPL_CLOSE_LISTSRV_RPL] = sched, | |
2247 | [CPL_PASS_ACCEPT_REQ] = sched, | |
2248 | [CPL_PASS_ESTABLISH] = sched, | |
2249 | [CPL_PEER_CLOSE] = sched, | |
2250 | [CPL_CLOSE_CON_RPL] = sched, | |
2251 | [CPL_ABORT_REQ_RSS] = sched, | |
2252 | [CPL_RDMA_TERMINATE] = sched, | |
2253 | [CPL_RDMA_EC_STATUS] = sched, | |
2254 | [CPL_SET_TCB_RPL] = set_tcb_rpl, | |
2255 | }; | |
2256 | ||
b038ced7 SW |
2257 | int __init iwch_cm_init(void) |
2258 | { | |
2259 | skb_queue_head_init(&rxq); | |
2260 | ||
2261 | workq = create_singlethread_workqueue("iw_cxgb3"); | |
2262 | if (!workq) | |
2263 | return -ENOMEM; | |
2264 | ||
b038ced7 SW |
2265 | return 0; |
2266 | } | |
2267 | ||
2268 | void __exit iwch_cm_term(void) | |
2269 | { | |
2270 | flush_workqueue(workq); | |
2271 | destroy_workqueue(workq); | |
2272 | } |